Scalpers should place stop losses 1-2 ticks below the recent high instead of above it, where orders cluster and price surges. This exits you before the acceleration phase kicks in and slippage hits.
A small trick for the aggressive scalpers. There is a way to avoid slippage. Put the stop loss not above the high. Above the high there are a lot of orders and what you see is that market will boom, accelerate. You see that the market, even if it's a failed auction, now is going down, it accelerates. So you lose an additional amount that you can protect. How you can protect them? Just put your stop loss 1 or 2 ticks below the high. So you are taken out before everyone that is full acceleration takes profit. And it's worth it.