The strategy is based on the following times:
D1 (not mandatory, but does not harm)
H4
H1
M30
H4 two red or green candles
(Thus already times a trend of the last few hours found)
H1 two red or green candles
(There will be more, because H4 already had two)
M30 several red or green candles
Sell or buy for 5-15 minutes, so get in and out pretty quickly and take profit.
What is also important: make sure to check for resistance before you go in.