1] this is not a problem if you check in on the position once a day
2] the price isn't going to change enough in the <60 seconds it takes to do this to matter
3] fees on MEXC are almost nonexistent and huge orders can be reduced to zero using maker limit orders. My trading fee on $2400 was 30 cents.
4] Worth repeating over and over again. Counterparty risk can not be overstated.