diff --git a/src/dex/fluid-dex/fluid-dex-e2e.test.ts b/src/dex/fluid-dex/fluid-dex-e2e.test.ts
index fedbf0b56..fbdda8bad 100644
--- a/src/dex/fluid-dex/fluid-dex-e2e.test.ts
+++ b/src/dex/fluid-dex/fluid-dex-e2e.test.ts
@@ -68,7 +68,6 @@ function testForNetwork(
   );
   const tokens = Tokens[network];
   const holders = Holders[network];
-  const nativeTokenSymbol = NativeTokenSymbols[network];
 
   const sideToContractMethods = new Map([
     [SwapSide.SELL, [ContractMethod.swapExactAmountIn]],
@@ -86,7 +85,7 @@ function testForNetwork(
                 tokens[tokenBSymbol],
                 holders[tokenASymbol],
                 tokenBAmount,
-                SwapSide.SELL,
+                side,
                 dexKey,
                 contractMethod as ContractMethod,
                 network,
@@ -99,7 +98,7 @@ function testForNetwork(
                 tokens[tokenASymbol],
                 holders[tokenBSymbol],
                 tokenBAmount,
-                SwapSide.SELL,
+                side,
                 dexKey,
                 contractMethod as ContractMethod,
                 network,
diff --git a/src/dex/fluid-dex/fluid-dex.ts b/src/dex/fluid-dex/fluid-dex.ts
index e794d0a20..8d511050a 100644
--- a/src/dex/fluid-dex/fluid-dex.ts
+++ b/src/dex/fluid-dex/fluid-dex.ts
@@ -334,6 +334,7 @@ export class FluidDex extends SimpleExchange implements IDex<FluidDexData> {
       exchangeData: swapData,
       targetExchange: pool!.address,
       returnAmountPos,
+      sendEthButSupportsInsertFromAmount: true,
     };
   }
 
diff --git a/src/executor/Executor03BytecodeBuilder.ts b/src/executor/Executor03BytecodeBuilder.ts
index 5ed683903..0b34d7219 100644
--- a/src/executor/Executor03BytecodeBuilder.ts
+++ b/src/executor/Executor03BytecodeBuilder.ts
@@ -73,6 +73,7 @@ export class Executor03BytecodeBuilder extends ExecutorBytecodeBuilder<
       swappedAmountNotPresentInExchangeData,
       specialDexFlag,
       specialDexSupportsInsertFromAmount,
+      sendEthButSupportsInsertFromAmount,
     } = exchangeParam;
     const isSpecialDex =
       specialDexFlag !== undefined && specialDexFlag !== SpecialDex.DEFAULT;
@@ -93,9 +94,16 @@ export class Executor03BytecodeBuilder extends ExecutorBytecodeBuilder<
       Flag.DONT_INSERT_FROM_AMOUNT_DONT_CHECK_BALANCE_AFTER_SWAP; // 0
 
     if (isEthSrc && !needWrap) {
+      const preventInsertForSendEth =
+        forcePreventInsertFromAmount || !sendEthButSupportsInsertFromAmount;
+
       dexFlag = dexFuncHasRecipient
-        ? Flag.SEND_ETH_EQUAL_TO_FROM_AMOUNT_DONT_CHECK_BALANCE_AFTER_SWAP // 9
-        : Flag.SEND_ETH_EQUAL_TO_FROM_AMOUNT_CHECK_SRC_TOKEN_BALANCE_AFTER_SWAP; // 5
+        ? preventInsertForSendEth
+          ? Flag.SEND_ETH_EQUAL_TO_FROM_AMOUNT_DONT_CHECK_BALANCE_AFTER_SWAP // 9
+          : Flag.SEND_ETH_EQUAL_TO_FROM_AMOUNT_PLUS_INSERT_FROM_AMOUNT_DONT_CHECK_BALANCE_AFTER_SWAP // 18
+        : preventInsertForSendEth
+        ? Flag.SEND_ETH_EQUAL_TO_FROM_AMOUNT_CHECK_SRC_TOKEN_BALANCE_AFTER_SWAP // 5
+        : Flag.SEND_ETH_EQUAL_TO_FROM_AMOUNT_PLUS_INSERT_FROM_AMOUNT_CHECK_SRC_TOKEN_BALANCE_AFTER_SWAP; // 18
     } else if (isEthDest && !needUnwrap) {
       dexFlag = forcePreventInsertFromAmount
         ? Flag.DONT_INSERT_FROM_AMOUNT_CHECK_ETH_BALANCE_AFTER_SWAP // 4