Solidity Chainlink keepers with PriceFeeds

I'm trying to integrate Pricefeeds in the chain keepers to automate a sell order when the price goes under certain value. Separately both work but when adding the Price feed function inside the checkUpkeep() it doesn't trigger the performUpkeep().

Does checkUpkeep() function can call the priceFeed function or is not even praepared for this?

how should I implement it then?

Here is the code:

function checkUpkeep(bytes memory /* checkData */) public view override returns (//,bytes memory value
        bool upkeepNeeded, 
        bytes memory num
        ){

        uint256 EthPrice = 0;
        // uint256 i = 2;
        EthPrice = getPrice();
        num = abi.encodePacked(EthPrice);
        if (EthPrice > 0){
            upkeepNeeded = true;
        }

        return (upkeepNeeded, num);//, value
    }

    function performUpkeep(bytes calldata num) external override {//, bytes calldata value
        (bool upkeepNeeded, ) = checkUpkeep("");
        
        if (!upkeepNeeded) {
            revert Order__UpkeepNotNeeded(
                address(this).balance,
                s_Wallets.length
            );
        }
        //Byte conversion to uint
        uint256 number;
        number = abi.decode(num, (uint256));

        // for(uint i=0;i<num.length;i++){
        //     number = number + uint(uint8(num[i]))*(2**(8*(num.length-(i+1))));
        // }
        s_nombre = number;
    }