diff --git a/app/settings/page.tsx b/app/settings/page.tsx
index e7bf273..48bbd1d 100644
--- a/app/settings/page.tsx
+++ b/app/settings/page.tsx
@@ -12,14 +12,17 @@ interface TradingSettings {
   // Global fallback settings
   MAX_POSITION_SIZE_USD: number
   LEVERAGE: number
+  USE_PERCENTAGE_SIZE: boolean
   
   // Per-symbol settings
   SOLANA_ENABLED: boolean
   SOLANA_POSITION_SIZE: number
   SOLANA_LEVERAGE: number
+  SOLANA_USE_PERCENTAGE_SIZE: boolean
   ETHEREUM_ENABLED: boolean
   ETHEREUM_POSITION_SIZE: number
   ETHEREUM_LEVERAGE: number
+  ETHEREUM_USE_PERCENTAGE_SIZE: boolean
   
   // Risk management
   STOP_LOSS_PERCENT: number
@@ -288,13 +291,17 @@ export default function SettingsPage() {
               </button>
             </div>
             <Setting
-              label="SOL Position Size (USD)"
+              label={`SOL Position Size (${settings.SOLANA_USE_PERCENTAGE_SIZE ? '%' : 'USD'})`}
               value={settings.SOLANA_POSITION_SIZE}
               onChange={(v) => updateSetting('SOLANA_POSITION_SIZE', v)}
               min={1}
-              max={10000}
+              max={settings.SOLANA_USE_PERCENTAGE_SIZE ? 100 : 10000}
               step={1}
-              description={`Base capital for SOL trades. With ${settings.SOLANA_LEVERAGE}x leverage = $${(settings.SOLANA_POSITION_SIZE * settings.SOLANA_LEVERAGE).toFixed(0)} notional position.`}
+              description={
+                settings.SOLANA_USE_PERCENTAGE_SIZE 
+                  ? `Percentage of free collateral for SOL trades. With ${settings.SOLANA_LEVERAGE}x leverage.`
+                  : `Base capital for SOL trades. With ${settings.SOLANA_LEVERAGE}x leverage = $${(settings.SOLANA_POSITION_SIZE * settings.SOLANA_LEVERAGE).toFixed(0)} notional position.`
+              }
             />
             <Setting
               label="SOL Leverage"
@@ -356,13 +363,17 @@ export default function SettingsPage() {
               </button>
             </div>
             <Setting
-              label="ETH Position Size (USD)"
+              label={`ETH Position Size (${settings.ETHEREUM_USE_PERCENTAGE_SIZE ? '%' : 'USD'})`}
               value={settings.ETHEREUM_POSITION_SIZE}
               onChange={(v) => updateSetting('ETHEREUM_POSITION_SIZE', v)}
               min={1}
-              max={10000}
+              max={settings.ETHEREUM_USE_PERCENTAGE_SIZE ? 100 : 10000}
               step={1}
-              description={`Base capital for ETH trades. With ${settings.ETHEREUM_LEVERAGE}x leverage = $${(settings.ETHEREUM_POSITION_SIZE * settings.ETHEREUM_LEVERAGE).toFixed(0)} notional position. Drift minimum: ~$38-40 (0.01 ETH).`}
+              description={
+                settings.ETHEREUM_USE_PERCENTAGE_SIZE
+                  ? `Percentage of free collateral for ETH trades. With ${settings.ETHEREUM_LEVERAGE}x leverage.`
+                  : `Base capital for ETH trades. With ${settings.ETHEREUM_LEVERAGE}x leverage = $${(settings.ETHEREUM_POSITION_SIZE * settings.ETHEREUM_LEVERAGE).toFixed(0)} notional position. Drift minimum: ~$38-40 (0.01 ETH).`
+              }
             />
             <Setting
               label="ETH Leverage"