diff --git a/app/api/trading/execute/route.ts b/app/api/trading/execute/route.ts
index e3a093f..b81cc50 100644
--- a/app/api/trading/execute/route.ts
+++ b/app/api/trading/execute/route.ts
@@ -106,10 +106,19 @@ export async function POST(request: NextRequest): Promise<NextResponse<ExecuteTr
 
     // Get trading configuration
     const config = getMergedConfig()
+
+    // Initialize Drift service and check account health before sizing
+    const driftService = await initializeDriftService()
+    const health = await driftService.getAccountHealth()
+    console.log(`🩺 Account health: Free collateral $${health.freeCollateral.toFixed(2)}`)
     
-    // Get symbol-specific position sizing
-    const { getPositionSizeForSymbol } = await import('@/config/trading')
-    const { size: positionSize, leverage, enabled } = getPositionSizeForSymbol(driftSymbol, config)
+    // Get symbol-specific position sizing (supports percentage-based sizing)
+    const { getActualPositionSizeForSymbol } = await import('@/config/trading')
+    const { size: positionSize, leverage, enabled, usePercentage } = await getActualPositionSizeForSymbol(
+      driftSymbol,
+      config,
+      health.freeCollateral
+    )
     
     // Check if trading is enabled for this symbol
     if (!enabled) {
@@ -126,16 +135,9 @@ export async function POST(request: NextRequest): Promise<NextResponse<ExecuteTr
     
     console.log(`📐 Symbol-specific sizing for ${driftSymbol}:`)
     console.log(`   Enabled: ${enabled}`)
-    console.log(`   Position size: $${positionSize}`)
+    console.log(`   Position size: $${positionSize.toFixed(2)} (${usePercentage ? 'percentage' : 'fixed'})`)
     console.log(`   Leverage: ${leverage}x`)
     
-    // Initialize Drift service if not already initialized
-    const driftService = await initializeDriftService()
-    
-    // Check account health before trading
-    const health = await driftService.getAccountHealth()
-    console.log('💊 Account health:', health)
-    
     if (health.freeCollateral <= 0) {
       return NextResponse.json(
         {