diff --git a/pkg/source/smardex/pool_simulator.go b/pkg/source/smardex/pool_simulator.go
index f167ddfda..0e04a4893 100644
--- a/pkg/source/smardex/pool_simulator.go
+++ b/pkg/source/smardex/pool_simulator.go
@@ -112,6 +112,7 @@ func (p *PoolSimulator) CalcAmountOut(tokenAmountIn poolpkg.TokenAmount, tokenOu
 	amount0, amount1 := tokenAmountIn.Amount, result.amountOut
 	feeToAmount0, feeToAmount1 := p.FeeToAmount.Fees0, p.FeeToAmount.Fees1
 	newPriceAverageIn, newPriceAverageOut := priceAverageIn, priceAverageOut
+	newFictiveReserveIn, newFictiveReserveOut := result.newFictiveReserveIn, result.newFictiveReserveOut
 	if zeroForOne {
 		feeToAmount0 = feeToAmount0.Add(
 			feeToAmount0,
@@ -122,6 +123,7 @@ func (p *PoolSimulator) CalcAmountOut(tokenAmountIn poolpkg.TokenAmount, tokenOu
 			feeToAmount1,
 			new(big.Int).Div(new(big.Int).Mul(amount1, p.PairFee.FeesPool), p.PairFee.FeesBase))
 		newPriceAverageIn, newPriceAverageOut = priceAverageOut, priceAverageIn
+		newFictiveReserveIn, newFictiveReserveOut = result.newFictiveReserveOut, result.newFictiveReserveIn
 	}
 
 	if zeroForOne {
@@ -138,8 +140,8 @@ func (p *PoolSimulator) CalcAmountOut(tokenAmountIn poolpkg.TokenAmount, tokenOu
 			SwapInfo: SwapInfo{
 				NewReserveIn:              new(big.Int).Sub(result.newReserveIn, feeToAmount0),
 				NewReserveOut:             new(big.Int).Sub(result.newReserveOut, feeToAmount1),
-				NewFictiveReserveIn:       result.newFictiveReserveIn,
-				NewFictiveReserveOut:      result.newFictiveReserveOut,
+				NewFictiveReserveIn:       newFictiveReserveIn,
+				NewFictiveReserveOut:      newFictiveReserveOut,
 				NewPriceAverageIn:         newPriceAverageIn,
 				NewPriceAverageOut:        newPriceAverageOut,
 				PriceAverageLastTimestamp: big.NewInt(userTradeTimestamp),
@@ -162,8 +164,8 @@ func (p *PoolSimulator) CalcAmountOut(tokenAmountIn poolpkg.TokenAmount, tokenOu
 		SwapInfo: SwapInfo{
 			NewReserveIn:              new(big.Int).Sub(result.newReserveIn, feeToAmount0),
 			NewReserveOut:             new(big.Int).Sub(result.newReserveOut, feeToAmount1),
-			NewFictiveReserveIn:       result.newFictiveReserveIn,
-			NewFictiveReserveOut:      result.newFictiveReserveOut,
+			NewFictiveReserveIn:       newFictiveReserveIn,
+			NewFictiveReserveOut:      newFictiveReserveOut,
 			NewPriceAverageIn:         newPriceAverageIn,
 			NewPriceAverageOut:        newPriceAverageOut,
 			PriceAverageLastTimestamp: big.NewInt(userTradeTimestamp),
diff --git a/pkg/source/smardex/pool_simulator_test.go b/pkg/source/smardex/pool_simulator_test.go
index e5259d711..50d3e8764 100644
--- a/pkg/source/smardex/pool_simulator_test.go
+++ b/pkg/source/smardex/pool_simulator_test.go
@@ -155,6 +155,25 @@ func TestGetAmountOut(t *testing.T) {
 			expectedResFictive0: parseString("85593526029"),
 			expectedResFictive1: parseString("7289358689105108450240064"),
 		},
+		{
+			name: "Test case 3",
+			amountParams: GetAmountParameters{
+				amount:            big.NewInt(2000000000000000000),
+				reserveIn:         parseString("3278796445628485066"),
+				reserveOut:        parseString("6213633437"),
+				fictiveReserveIn:  parseString("1602466039436492633"),
+				fictiveReserveOut: parseString("3179127537"),
+				priceAverageIn:    parseString("1602466039436492633"),
+				priceAverageOut:   parseString("3179127537"),
+				feesLP:            FEES_LP_DEFAULT_ETHEREUM,
+				feesPool:          FEES_POOL_DEFAULT_ETHEREUM,
+				feesBase:          FEES_BASE_ETHEREUM},
+			expectedAmountOutT0: parseString("1719846589"),
+			expectedReserve0:    parseString("5278396445628485066"),
+			expectedReserve1:    parseString("4493786848"),
+			expectedResFictive0: parseString("3530568934927624489"),
+			expectedResFictive1: parseString("1317438058"),
+		},
 	}
 
 	for _, tc := range testCases {