Using the same account and the same currency for such operations can easily trigger verification, and the risk control system may easily determine you as a script.

$NIGHT
Used yesterday's method to grind 2u, feels okay, lower than directly brushing the wear
Using reverse orders, set a low price for half the position, for example, if over 1000u you can use 500u to place different low limit reverse orders in batches, can set a bottom of 400u to catch the waterfall, and use the remaining small amounts to brush, wait for a bit of an upward movement when it drops to brush again
Tested under the same conditions, a wear of over 5u is needed to complete the task, the rest using this method are all within 3u, and there was one today that could be completed with just 1.1u
The downside is that it is time-consuming and labor-intensive
The best method is to watch the lines on a backup machine, feel the reversal and brush madly for those few seconds, if the situation is not right, stop immediately, the wear has gains and losses that offset each other, which is better than being stuck with a large amount losing more than ten.