You're not the only person to report this unfortunately. Weirdly when I've gone through my Binance trade log and compared, it's been accurate but I've had others send me screenshots and there have been inaccuracies.
The sheet logs what gekko reports at the end of a trade - unfortunately it's the best data that gekko can give. The whole trade module in gekko is getting a massive overhaul at the moment (check pull requests on GitHub) so I'm hoping that might improve things.
If you have any logs from the sheet and exchange you're able to share here to show where it doesn't match that would be excellent.
The sheet logs what gekko reports at the end of a trade - unfortunately it's the best data that gekko can give. The whole trade module in gekko is getting a massive overhaul at the moment (check pull requests on GitHub) so I'm hoping that might improve things.
If you have any logs from the sheet and exchange you're able to share here to show where it doesn't match that would be excellent.