This kind of scalping in the direction of short-term oscillators while using longer-term oscillators to guide bigger positions is very important. Backtesting shows that if you try to trade directly on longer-timescale crossovers, (like shorting now based on the 4-hour crossover despite the 15-minute buy), you will typically LOSE money due to the large lag in the longer timescale crosses. They are for confirmation of major trend changes, but the shorter timescales are needed to time good trade entries.