If you have a platform like TDAmeritrade’s Think ‘n Swim that keeps you stop loss order private until your condition is met. If a market maker can see your order they will take your stock.
I’m an Advisor.
I had UNH for a client that we bought for 30k, it had run up to about 200k, big winner. I suggested we use stops to let it run.
The stock was at 210, I put an order in at 199 stop loss. The stock went down from 210, to my stop (the penny), then shot right back later in the day to the 210.
Total theft.
“If a market maker can see your order they will take your stock.”
I just wrote the same thing. It is low hanging fruit to the bloodsuckers.