I have a question. In your tutorial it says "In the top field enter the amount of BTC you want to exchange". For example, I entered 0.001 but to save on fees, I will send not 0.001 BTC, but a little more or a little less. Will the exchange be completed by the amount of transferred BTC or do I need to transfer the exact amount of BTC?
The amount you pay will be automatically recognized by the system. Even if the amount you pay is inconsistent with the amount submitted by the system, it does not matter.