can you create a strategy based on this indicator with ema
indicator:
1. pg cycle with default parameters
buy level: 30
sell level : 70
2. ema 9
3.ema 19
buy:ema 9 > ema 19 and price > ema 9 and pg cycle cross over buy level
sell:ema 9 < ema 19 and price < ema 9 and pg cycle cross under sell level