Changes in the exchange rate of binary futures

Now we're going to go back to the logic of how the trading rate is calculated in the system. 1, the current default rate for the binary futures is 0.008 and 0.01, in fact it should now be 0.02 and 0、04, and every time it changes manually, trouble 2, the total sentiment retesting system rate calculation is done by recalculating the difference, the sentiment and the binary futures are not matched by the current charges, and the rate is calculated by the difference. 3rd, from the calculations, the rate calculation should be wrong, I'm going to re-test the logic in the system, selling at a one-thousandth profit, and the result is that the profit is much higher than the transaction fee, and the reasonable rate is six-thousandths, and my result should be that the transaction fee is higher than the profit, and the profit should be negative.