best way to sell : EUR Customer

Hi Lads,

So I have CDC App and Exchange.

My selling technique is as below (last transaction: NEAR):

-> Send NEAR from APP to Exchange.-> Exchange NEAR to USDT-> Transfer USDT to APP-> Sell USDT to EUR.

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I have been following this method, but last time selling straight on APP was better than sending to exchange and converting to USDT.

What is the optimal method?