I just saw this interesting idea, don't know how it works in real.

Time Frame : 1H

At any open candle, 'SELL' with TP 20 pips and SL 20 pips, set 'pending order' 20 pips above the open candle with TP 20 pips and SL 20 pips.

1) If the 'SELL' TP hit, close the 'pending order'.

2) If the 'SELL' SL hit, the 'pending order' will triggered, wait for it to end (either it hits the TP or SL)

(It doesn’t have to finish by one candle, it might involve more than one candle).

If either 1) or 2) done, wait for a new candle to open, then continue from the beginning (infinite).

*You can also start with 'BUY' (vice versa).

Pair: GBPUSD or any pair with small spread and less active.