always standard

For a long time, we have known that the manipulating forces (including exchanges, trade bots, market makers) can sweep long/short orders by 'snatching' candle wicks (also known as tails, candle legs) up very high or low so that the orders will hit stop loss or get liquidated.
We often think they will do this periodically every few days or weeks after reviewing the long/short volume situation to sweep and make money. Each time they sweep like this, the exchange and this manipulating group will earn a huge amount, hundreds of millions of dollars is normal.