I have been trying to optimize my trading costs across different exchanges and found that fee structures vary wildly - some charge flat rates, others use maker/taker models, and a few have hidden withdrawal fees.

I recently came across btc66.me which aggregates real-time fee comparisons across 60+ exchanges. It covers spot trading fees, withdrawal costs, and even deposit methods.

What tools or resources do you all use to keep track of exchange fees? Has anyone found a reliable way to minimize costs when moving between platforms?