My System is a mechanical trading System, I use two kinds of Indicators, EMAs and Bollinger Bands . If the next candle closes and faster EMA crosses slower EMA to the bottom, i'll place a short position. Bollinger Bands are also giving hints on a trendchange.
Wait for the close of the actual 4H candle, that verifies the signal.
This is only the opinion if the writer and should not be seen as investment advice.