diff --git a/packages/react-app/src/components/Exchange.js b/packages/react-app/src/components/Exchange.js
index f93bf3f..bc514e3 100644
--- a/packages/react-app/src/components/Exchange.js
+++ b/packages/react-app/src/components/Exchange.js
@@ -29,6 +29,10 @@ const Exchange = ({ pools }) => {
     const fromTokenContract = new Contract(fromToken, ERC20.abi);
     const fromTokenBalance = useTokenBalance(fromToken, account);   //Know balance of "from Token"
     const toTokenBalance = useTokenBalance(toToken, account);       //Know balance of "to Token"
+    const tokenAllowance = useTokenAllowance(fromToken, account, ROUTER_ADDRESS) || parseUnits("0");
+    const approvedNeeded = fromValueBigNumber.gt(tokenAllowance);   //We need to approve to make the swap
+    const formValueIsGreaterThan0 = fromValueBigNumber.gt(parseUnits("0")); //has to be greater than 0
+    const hasEnoughBalance = fromValueBigNumber.lte(fromTokenBalance ?? parseUnits("0")); //lte = lower than or equal to
 
     const isApproving = isOperationPending(swapApproveState);
     const isSwapping = isOperationPending(swapExecuteState);