Sweep at 30 points above the stop loss
I made a GDPUSD sell stop order with a price of 1.30475 At 13:59, September 13, 2018, and the stop loss was set at 1.30555. The final order was closed at 13:59:47, and the stop loss was closed at a price of 1.30846 at 13:59:47 (the price was 30 points higher than the stop loss price, and 17 points higher than the highest price in this period). At the moment of transaction, the difference was increased, making the closing of the pending order and the stop loss completed at the same time.

Severe Slippage
The following is the original recommendation
以高出止损30个点的价格扫损
2018年9月13号13:59 我以1.30475挂的GDPUSD sell stop 空单,止损设置在1.30555,最终单子在13:59:47成交,又同时间13:59:47以1.30846的价格止损(此价格高于止损价格30个点,高于本时间段最高价17个点),在成交的瞬间加大点差,使得挂单成交和止损同时间完成。