In order to check if a trade will go through or not and at what values/prices Futureswap harnesses an off-chain API that tries to predict these outcomes. These are called the validation API's.
They return all relevant details for the specific trading including:
Market Price at which it would be opened at. This includes any slippage
Current Index price
Collateral amount in stable
The trade fee
The estimated current gas cost
The total cost for trade