diff --git a/README.md b/README.md
index b2b1ac1..d69f237 100644
--- a/README.md
+++ b/README.md
@@ -185,6 +185,38 @@ if ($response->getStatusCode() === 200) {
 }
 ```
 
+### Place TP/SL Order
+
+```php
+use Msr\LaravelBitunixApi\Requests\PlaceTpSlOrderRequestContract;
+
+$api = app(PlaceTpSlOrderRequestContract::class);
+
+// Place TP/SL order with both take profit and stop loss
+$response = $api->placeTpSlOrder(
+    'BTCUSDT',          // symbol
+    '111',              // positionId
+    '50000',            // tpPrice
+    'LAST_PRICE',       // tpStopType
+    '45000',            // slPrice
+    'LAST_PRICE',       // slStopType
+    'LIMIT',            // tpOrderType
+    '50000.1',          // tpOrderPrice
+    'LIMIT',            // slOrderType
+    '45000.1',          // slOrderPrice
+    '1',                // tpQty
+    '1'                 // slQty
+);
+
+if ($response->getStatusCode() === 200) {
+    $data = json_decode($response->getBody()->getContents(), true);
+    if ($data['code'] === 0) {
+        echo "TP/SL order placed successfully!";
+        echo "Order ID: " . $data['data']['orderId'];
+    }
+}
+```
+
 ### Get Future Kline Data
 
 ```php
@@ -210,6 +242,7 @@ if ($response->getStatusCode() === 200) {
 ### Trading
 
 - `placeOrder(...)` - Place a new order with full support for all order types, take profit, stop loss, and position management
+- `placeTpSlOrder(...)` - Place TP/SL order for existing positions
 - `flashClosePosition(string $positionId)` - Flash close position by position ID
 
 ### Position Management
@@ -235,6 +268,7 @@ if ($response->getStatusCode() === 200) {
 - **Change Margin Mode**: 10 req/sec/uid
 - **Get Single Account**: 10 req/sec/uid
 - **Place Order**: 10 req/sec/uid
+- **Place TP/SL Order**: 10 req/sec/uid
 - **Flash Close Position**: 5 req/sec/uid
 - **Get Pending Positions**: 10 req/sec/uid
 
@@ -276,6 +310,7 @@ vendor/bin/pest tests/ChangeLeverageTest.php
 vendor/bin/pest tests/ChangeMarginModeTest.php
 vendor/bin/pest tests/GetSingleAccountTest.php
 vendor/bin/pest tests/PlaceOrderTest.php
+vendor/bin/pest tests/PlaceTpSlOrderTest.php
 vendor/bin/pest tests/FlashClosePositionTest.php
 vendor/bin/pest tests/GetPendingPositionsTest.php
 vendor/bin/pest tests/HeaderTest.php
@@ -289,6 +324,7 @@ See the `examples/` directory for complete usage examples:
 - `ChangeMarginModeExample.php`
 - `GetSingleAccountExample.php`
 - `PlaceOrderExample.php`
+- `PlaceTpSlOrderExample.php`
 - `FlashClosePositionExample.php`
 - `GetPendingPositionsExample.php`
 
diff --git a/examples/PlaceTpSlOrderExample.php b/examples/PlaceTpSlOrderExample.php
new file mode 100644
index 0000000..535d651
--- /dev/null
+++ b/examples/PlaceTpSlOrderExample.php
@@ -0,0 +1,247 @@
+<?php
+
+/**
+ * Example usage of Place TP/SL Order functionality
+ *
+ * This example demonstrates how to use the LaravelBitunixApi package
+ * to place TP/SL orders on Bitunix exchange.
+ */
+
+require_once __DIR__.'/../vendor/autoload.php';
+
+use Msr\LaravelBitunixApi\Requests\PlaceTpSlOrderRequestContract;
+
+// Example configuration (in real usage, these would be in your .env file)
+config([
+    'bitunix-api.future_base_uri' => 'https://fapi.bitunix.com/',
+    'bitunix-api.api_key' => 'your-api-key-here',
+    'bitunix-api.api_secret' => 'your-api-secret-here',
+    'bitunix-api.language' => 'en-US',
+]);
+
+try {
+    // Get the API instance
+    $api = app(PlaceTpSlOrderRequestContract::class);
+
+    echo "🎯 Place TP/SL Order Examples\n\n";
+
+    // Example 1: Place TP/SL order with both take profit and stop loss
+    echo "1. Placing TP/SL order with both TP and SL...\n";
+    $response = $api->placeTpSlOrder(
+        'BTCUSDT',
+        '111',
+        '50000',        // tpPrice
+        'LAST_PRICE',   // tpStopType
+        '45000',        // slPrice
+        'LAST_PRICE',   // slStopType
+        'LIMIT',        // tpOrderType
+        '50000.1',      // tpOrderPrice
+        'LIMIT',        // slOrderType
+        '45000.1',      // slOrderPrice
+        '1',            // tpQty
+        '1'             // slQty
+    );
+
+    if ($response->getStatusCode() === 200) {
+        $data = json_decode($response->getBody()->getContents(), true);
+        if ($data['code'] === 0) {
+            echo "✅ TP/SL order placed successfully!\n";
+            echo 'Order ID: '.$data['data']['orderId']."\n";
+        } else {
+            echo '❌ API Error: '.$data['msg']."\n";
+        }
+    } else {
+        echo '❌ HTTP Error: '.$response->getStatusCode()."\n";
+    }
+
+    echo "\n";
+
+    // Example 2: Place TP/SL order with take profit only
+    echo "2. Placing TP/SL order with take profit only...\n";
+    $response = $api->placeTpSlOrder(
+        'BTCUSDT',
+        '111',
+        '50000',        // tpPrice
+        'MARK_PRICE',   // tpStopType
+        null,           // slPrice
+        null,           // slStopType
+        'MARKET',       // tpOrderType
+        null,           // tpOrderPrice
+        null,           // slOrderType
+        null,           // slOrderPrice
+        '1',            // tpQty
+        null            // slQty
+    );
+
+    if ($response->getStatusCode() === 200) {
+        $data = json_decode($response->getBody()->getContents(), true);
+        if ($data['code'] === 0) {
+            echo "✅ TP order placed successfully!\n";
+            echo 'Order ID: '.$data['data']['orderId']."\n";
+        } else {
+            echo '❌ API Error: '.$data['msg']."\n";
+        }
+    } else {
+        echo '❌ HTTP Error: '.$response->getStatusCode()."\n";
+    }
+
+    echo "\n";
+
+    // Example 3: Place TP/SL order with stop loss only
+    echo "3. Placing TP/SL order with stop loss only...\n";
+    $response = $api->placeTpSlOrder(
+        'BTCUSDT',
+        '111',
+        null,           // tpPrice
+        null,           // tpStopType
+        '45000',        // slPrice
+        'MARK_PRICE',   // slStopType
+        null,           // tpOrderType
+        null,           // tpOrderPrice
+        'MARKET',       // slOrderType
+        null,           // slOrderPrice
+        null,           // tpQty
+        '1'             // slQty
+    );
+
+    if ($response->getStatusCode() === 200) {
+        $data = json_decode($response->getBody()->getContents(), true);
+        if ($data['code'] === 0) {
+            echo "✅ SL order placed successfully!\n";
+            echo 'Order ID: '.$data['data']['orderId']."\n";
+        } else {
+            echo '❌ API Error: '.$data['msg']."\n";
+        }
+    } else {
+        echo '❌ HTTP Error: '.$response->getStatusCode()."\n";
+    }
+
+    echo "\n";
+
+    // Example 4: Place TP/SL order with different symbols
+    echo "4. Placing TP/SL orders for different symbols...\n";
+    $symbols = ['BTCUSDT', 'ETHUSDT', 'ADAUSDT'];
+
+    foreach ($symbols as $symbol) {
+        echo "Placing TP/SL order for {$symbol}...\n";
+        
+        $response = $api->placeTpSlOrder(
+            $symbol,
+            '111',
+            '50000',
+            'LAST_PRICE',
+            '45000',
+            'LAST_PRICE',
+            'LIMIT',
+            '50000.1',
+            'LIMIT',
+            '45000.1',
+            '1',
+            '1'
+        );
+        
+        if ($response->getStatusCode() === 200) {
+            $data = json_decode($response->getBody()->getContents(), true);
+            if ($data['code'] === 0) {
+                echo "✅ {$symbol} TP/SL order placed successfully!\n";
+                echo 'Order ID: '.$data['data']['orderId']."\n";
+            } else {
+                echo "❌ Failed to place {$symbol} TP/SL order: ".$data['msg']."\n";
+            }
+        } else {
+            echo "❌ HTTP Error for {$symbol}: ".$response->getStatusCode()."\n";
+        }
+    }
+
+    echo "\n";
+
+    // Example 5: Place TP/SL order with different position IDs
+    echo "5. Placing TP/SL orders for different position IDs...\n";
+    $positionIds = ['111', '222', '333'];
+
+    foreach ($positionIds as $positionId) {
+        echo "Placing TP/SL order for position ID {$positionId}...\n";
+        
+        $response = $api->placeTpSlOrder(
+            'BTCUSDT',
+            $positionId,
+            '50000',
+            'LAST_PRICE',
+            '45000',
+            'LAST_PRICE',
+            'LIMIT',
+            '50000.1',
+            'LIMIT',
+            '45000.1',
+            '1',
+            '1'
+        );
+        
+        if ($response->getStatusCode() === 200) {
+            $data = json_decode($response->getBody()->getContents(), true);
+            if ($data['code'] === 0) {
+                echo "✅ Position {$positionId} TP/SL order placed successfully!\n";
+                echo 'Order ID: '.$data['data']['orderId']."\n";
+            } else {
+                echo "❌ Failed to place position {$positionId} TP/SL order: ".$data['msg']."\n";
+            }
+        } else {
+            echo "❌ HTTP Error for position {$positionId}: ".$response->getStatusCode()."\n";
+        }
+    }
+
+    echo "\n";
+
+    // Example 6: Error handling
+    echo "6. Error handling example...\n";
+    $response = $api->placeTpSlOrder('INVALID', '111');
+    
+    if ($response->getStatusCode() === 200) {
+        $data = json_decode($response->getBody()->getContents(), true);
+        if ($data['code'] === 0) {
+            echo "✅ TP/SL order placed successfully!\n";
+        } else {
+            echo '❌ API Error: '.$data['msg']."\n";
+            echo "This is expected for invalid symbol\n";
+        }
+    } else {
+        echo '❌ HTTP Error: '.$response->getStatusCode()."\n";
+    }
+
+} catch (Exception $e) {
+    echo '❌ Exception: '.$e->getMessage()."\n";
+}
+
+/**
+ * Place TP/SL Order Features:
+ * 
+ * - Place TP/SL orders for existing positions
+ * - Rate limit: 10 req/sec/UID
+ * - Supports both take profit and stop loss
+ * - Flexible parameter configuration
+ * 
+ * Required Parameters:
+ * - symbol: Trading pair
+ * - positionId: Position ID associated with TP/SL
+ * 
+ * Optional Parameters:
+ * - tpPrice: Take-profit trigger price
+ * - tpStopType: Take-profit trigger type (LAST_PRICE/MARK_PRICE)
+ * - slPrice: Stop-loss trigger price
+ * - slStopType: Stop-loss trigger type (LAST_PRICE/MARK_PRICE)
+ * - tpOrderType: Take-profit order type (LIMIT/MARKET)
+ * - tpOrderPrice: Take-profit order price
+ * - slOrderType: Stop-loss order type (LIMIT/MARKET)
+ * - slOrderPrice: Stop-loss order price
+ * - tpQty: Take-profit order quantity (base coin)
+ * - slQty: Stop-loss order quantity (base coin)
+ * 
+ * Note: At least one of tpPrice or slPrice is required.
+ * At least one of tpQty or slQty is required.
+ * 
+ * Environment Variables Required:
+ *
+ * BITUNIX_API_KEY=your-api-key
+ * BITUNIX_API_SECRET=your-api-secret
+ * BITUNIX_LANGUAGE=en-US
+ */
diff --git a/src/LaravelBitunixApi.php b/src/LaravelBitunixApi.php
index 8f6ce69..c0b3843 100644
--- a/src/LaravelBitunixApi.php
+++ b/src/LaravelBitunixApi.php
@@ -11,9 +11,10 @@ use Msr\LaravelBitunixApi\Requests\GetPendingPositionsRequestContract;
 use Msr\LaravelBitunixApi\Requests\GetSingleAccountRequestContract;
 use Msr\LaravelBitunixApi\Requests\Header;
 use Msr\LaravelBitunixApi\Requests\PlaceOrderRequestContract;
+use Msr\LaravelBitunixApi\Requests\PlaceTpSlOrderRequestContract;
 use Psr\Http\Message\ResponseInterface;
 
-class LaravelBitunixApi implements ChangeLeverageRequestContract, ChangeMarginModeRequestContract, FlashClosePositionRequestContract, FutureKLineRequestContract, GetPendingPositionsRequestContract, GetSingleAccountRequestContract, PlaceOrderRequestContract
+class LaravelBitunixApi implements ChangeLeverageRequestContract, ChangeMarginModeRequestContract, FlashClosePositionRequestContract, FutureKLineRequestContract, GetPendingPositionsRequestContract, GetSingleAccountRequestContract, PlaceOrderRequestContract, PlaceTpSlOrderRequestContract
 {
     private Client $publicFutureClient;
 
@@ -201,4 +202,62 @@ class LaravelBitunixApi implements ChangeLeverageRequestContract, ChangeMarginMo
 
         return $response;
     }
+
+    public function placeTpSlOrder(
+        string $symbol,
+        string $positionId,
+        ?string $tpPrice = null,
+        ?string $tpStopType = null,
+        ?string $slPrice = null,
+        ?string $slStopType = null,
+        ?string $tpOrderType = null,
+        ?string $tpOrderPrice = null,
+        ?string $slOrderType = null,
+        ?string $slOrderPrice = null,
+        ?string $tpQty = null,
+        ?string $slQty = null
+    ): ResponseInterface {
+        $body = [
+            'symbol' => $symbol,
+            'positionId' => $positionId,
+        ];
+
+        // Add optional parameters if provided
+        if ($tpPrice !== null) {
+            $body['tpPrice'] = $tpPrice;
+        }
+        if ($tpStopType !== null) {
+            $body['tpStopType'] = $tpStopType;
+        }
+        if ($slPrice !== null) {
+            $body['slPrice'] = $slPrice;
+        }
+        if ($slStopType !== null) {
+            $body['slStopType'] = $slStopType;
+        }
+        if ($tpOrderType !== null) {
+            $body['tpOrderType'] = $tpOrderType;
+        }
+        if ($tpOrderPrice !== null) {
+            $body['tpOrderPrice'] = $tpOrderPrice;
+        }
+        if ($slOrderType !== null) {
+            $body['slOrderType'] = $slOrderType;
+        }
+        if ($slOrderPrice !== null) {
+            $body['slOrderPrice'] = $slOrderPrice;
+        }
+        if ($tpQty !== null) {
+            $body['tpQty'] = $tpQty;
+        }
+        if ($slQty !== null) {
+            $body['slQty'] = $slQty;
+        }
+
+        $response = $this->getPrivateFutureClient([], $body)->post('tpsl/place_order', [
+            'json' => $body,
+        ]);
+
+        return $response;
+    }
 }
diff --git a/src/Requests/PlaceTpSlOrderRequestContract.php b/src/Requests/PlaceTpSlOrderRequestContract.php
new file mode 100644
index 0000000..5e8aba4
--- /dev/null
+++ b/src/Requests/PlaceTpSlOrderRequestContract.php
@@ -0,0 +1,39 @@
+<?php
+
+namespace Msr\LaravelBitunixApi\Requests;
+
+use Psr\Http\Message\ResponseInterface;
+
+interface PlaceTpSlOrderRequestContract
+{
+    /**
+     * Place TP/SL Order
+     *
+     * @param  string  $symbol  Trading pair
+     * @param  string  $positionId  Position ID associated with take-profit and stop-loss
+     * @param  string|null  $tpPrice  Take-profit trigger price
+     * @param  string|null  $tpStopType  Take-profit trigger type (LAST_PRICE/MARK_PRICE)
+     * @param  string|null  $slPrice  Stop-loss trigger price
+     * @param  string|null  $slStopType  Stop-loss trigger type (LAST_PRICE/MARK_PRICE)
+     * @param  string|null  $tpOrderType  Take-profit order type (LIMIT/MARKET)
+     * @param  string|null  $tpOrderPrice  Take-profit order price
+     * @param  string|null  $slOrderType  Stop-loss order type (LIMIT/MARKET)
+     * @param  string|null  $slOrderPrice  Stop-loss order price
+     * @param  string|null  $tpQty  Take-profit order quantity (base coin)
+     * @param  string|null  $slQty  Stop-loss order quantity (base coin)
+     */
+    public function placeTpSlOrder(
+        string $symbol,
+        string $positionId,
+        ?string $tpPrice = null,
+        ?string $tpStopType = null,
+        ?string $slPrice = null,
+        ?string $slStopType = null,
+        ?string $tpOrderType = null,
+        ?string $tpOrderPrice = null,
+        ?string $slOrderType = null,
+        ?string $slOrderPrice = null,
+        ?string $tpQty = null,
+        ?string $slQty = null
+    ): ResponseInterface;
+}
diff --git a/tests/PlaceTpSlOrderTest.php b/tests/PlaceTpSlOrderTest.php
new file mode 100644
index 0000000..1baabaa
--- /dev/null
+++ b/tests/PlaceTpSlOrderTest.php
@@ -0,0 +1,253 @@
+<?php
+
+use Msr\LaravelBitunixApi\Requests\PlaceTpSlOrderRequestContract;
+
+beforeEach(function () {
+    config([
+        'bitunix-api.future_base_uri' => 'https://fapi.bitunix.com/',
+        'bitunix-api.api_key' => 'test-api-key',
+        'bitunix-api.api_secret' => 'test-secret-key',
+        'bitunix-api.language' => 'en-US',
+    ]);
+});
+
+it('can place TP/SL order with required parameters only', function () {
+    $api = app(PlaceTpSlOrderRequestContract::class);
+
+    expect(fn() => $api->placeTpSlOrder('BTCUSDT', '111'))
+        ->not->toThrow(Exception::class);
+});
+
+it('can place TP/SL order with take profit only', function () {
+    $api = app(PlaceTpSlOrderRequestContract::class);
+
+    expect(fn() => $api->placeTpSlOrder(
+        'BTCUSDT',
+        '111',
+        '50000',        // tpPrice
+        'LAST_PRICE',   // tpStopType
+        null,           // slPrice
+        null,           // slStopType
+        'LIMIT',        // tpOrderType
+        '50000.1',      // tpOrderPrice
+        null,           // slOrderType
+        null,           // slOrderPrice
+        '1',            // tpQty
+        null            // slQty
+    ))->not->toThrow(Exception::class);
+});
+
+it('can place TP/SL order with stop loss only', function () {
+    $api = app(PlaceTpSlOrderRequestContract::class);
+
+    expect(fn() => $api->placeTpSlOrder(
+        'BTCUSDT',
+        '111',
+        null,           // tpPrice
+        null,           // tpStopType
+        '45000',        // slPrice
+        'LAST_PRICE',   // slStopType
+        null,           // tpOrderType
+        null,           // tpOrderPrice
+        'LIMIT',        // slOrderType
+        '45000.1',      // slOrderPrice
+        null,           // tpQty
+        '1'             // slQty
+    ))->not->toThrow(Exception::class);
+});
+
+it('can place TP/SL order with both take profit and stop loss', function () {
+    $api = app(PlaceTpSlOrderRequestContract::class);
+
+    expect(fn() => $api->placeTpSlOrder(
+        'BTCUSDT',
+        '111',
+        '50000',        // tpPrice
+        'LAST_PRICE',   // tpStopType
+        '45000',        // slPrice
+        'LAST_PRICE',   // slStopType
+        'LIMIT',        // tpOrderType
+        '50000.1',      // tpOrderPrice
+        'LIMIT',        // slOrderType
+        '45000.1',      // slOrderPrice
+        '1',            // tpQty
+        '1'             // slQty
+    ))->not->toThrow(Exception::class);
+});
+
+it('validates place TP/SL order method exists', function () {
+    $api = app(PlaceTpSlOrderRequestContract::class);
+
+    expect(method_exists($api, 'placeTpSlOrder'))->toBeTrue();
+});
+
+it('can handle different symbol formats', function () {
+    $api = app(PlaceTpSlOrderRequestContract::class);
+
+    $symbols = ['BTCUSDT', 'ETHUSDT', 'ADAUSDT'];
+
+    foreach ($symbols as $symbol) {
+        expect(fn() => $api->placeTpSlOrder($symbol, '111'))
+            ->not->toThrow(Exception::class);
+    }
+});
+
+it('can handle different position ID formats', function () {
+    $api = app(PlaceTpSlOrderRequestContract::class);
+
+    $positionIds = ['111', 'position-123', '19848247723672'];
+
+    foreach ($positionIds as $positionId) {
+        expect(fn() => $api->placeTpSlOrder('BTCUSDT', $positionId))
+            ->not->toThrow(Exception::class);
+    }
+});
+
+it('can handle different stop types', function () {
+    $api = app(PlaceTpSlOrderRequestContract::class);
+
+    $stopTypes = ['LAST_PRICE', 'MARK_PRICE'];
+
+    foreach ($stopTypes as $stopType) {
+        expect(fn() => $api->placeTpSlOrder(
+            'BTCUSDT',
+            '111',
+            '50000',
+            $stopType,
+            '45000',
+            $stopType
+        ))->not->toThrow(Exception::class);
+    }
+});
+
+it('can handle different order types', function () {
+    $api = app(PlaceTpSlOrderRequestContract::class);
+
+    $orderTypes = ['LIMIT', 'MARKET'];
+
+    foreach ($orderTypes as $orderType) {
+        expect(fn() => $api->placeTpSlOrder(
+            'BTCUSDT',
+            '111',
+            '50000',
+            'LAST_PRICE',
+            '45000',
+            'LAST_PRICE',
+            $orderType,
+            '50000.1',
+            $orderType,
+            '45000.1'
+        ))->not->toThrow(Exception::class);
+    }
+});
+
+it('can handle different quantity formats', function () {
+    $api = app(PlaceTpSlOrderRequestContract::class);
+
+    $quantities = ['1', '0.1', '10.5', '100'];
+
+    foreach ($quantities as $qty) {
+        expect(fn() => $api->placeTpSlOrder(
+            'BTCUSDT',
+            '111',
+            '50000',
+            'LAST_PRICE',
+            '45000',
+            'LAST_PRICE',
+            'LIMIT',
+            '50000.1',
+            'LIMIT',
+            '45000.1',
+            $qty,
+            $qty
+        ))->not->toThrow(Exception::class);
+    }
+});
+
+it('can handle different price formats', function () {
+    $api = app(PlaceTpSlOrderRequestContract::class);
+
+    $prices = ['50000', '50000.1', '50000.01', '50000.001'];
+
+    foreach ($prices as $price) {
+        expect(fn() => $api->placeTpSlOrder(
+            'BTCUSDT',
+            '111',
+            $price,
+            'LAST_PRICE',
+            '45000',
+            'LAST_PRICE',
+            'LIMIT',
+            $price,
+            'LIMIT',
+            '45000.1'
+        ))->not->toThrow(Exception::class);
+    }
+});
+
+it('can handle multiple place TP/SL order calls', function () {
+    $api = app(PlaceTpSlOrderRequestContract::class);
+
+    $calls = [
+        ['BTCUSDT', '111'],
+        ['ETHUSDT', '222', '3000', 'LAST_PRICE'],
+        ['ADAUSDT', '333', null, null, '0.5', 'LAST_PRICE'],
+        ['BTCUSDT', '444', '50000', 'LAST_PRICE', '45000', 'LAST_PRICE', 'LIMIT', '50000.1', 'LIMIT', '45000.1', '1', '1'],
+    ];
+
+    foreach ($calls as $params) {
+        expect(fn() => $api->placeTpSlOrder(...$params))
+            ->not->toThrow(Exception::class);
+    }
+});
+
+it('validates place TP/SL order response structure', function () {
+    $api = app(PlaceTpSlOrderRequestContract::class);
+
+    // This test verifies the method can be called without throwing exceptions
+    // The actual response structure will be validated by the API
+    expect(fn() => $api->placeTpSlOrder('BTCUSDT', '111'))
+        ->not->toThrow(Exception::class);
+});
+
+it('can handle edge cases for TP/SL order', function () {
+    $api = app(PlaceTpSlOrderRequestContract::class);
+
+    // Test with minimum required parameters
+    expect(fn() => $api->placeTpSlOrder('BTCUSDT', '111'))
+        ->not->toThrow(Exception::class);
+
+    // Test with all parameters
+    expect(fn() => $api->placeTpSlOrder(
+        'BTCUSDT',
+        '111',
+        '50000',
+        'LAST_PRICE',
+        '45000',
+        'LAST_PRICE',
+        'LIMIT',
+        '50000.1',
+        'LIMIT',
+        '45000.1',
+        '1',
+        '1'
+    ))->not->toThrow(Exception::class);
+});
+
+it('can handle special characters in parameters', function () {
+    $api = app(PlaceTpSlOrderRequestContract::class);
+
+    // Test with special characters in position ID
+    expect(fn() => $api->placeTpSlOrder('BTCUSDT', 'pos-123-abc'))
+        ->not->toThrow(Exception::class);
+
+    // Test with decimal prices
+    expect(fn() => $api->placeTpSlOrder(
+        'BTCUSDT',
+        '111',
+        '50000.123',
+        'LAST_PRICE',
+        '45000.456',
+        'LAST_PRICE'
+    ))->not->toThrow(Exception::class);
+});