20 & 50 Weekly Moving Average Crossover

This is a weekly chart of BTCusd, bitfinix. I've plotted 2 Weekly Moving averages (w-MA) on this chart - 20(Green) & 50 (red). As you all can see clearly that whenever in the past 50 w-MA crosses 20 w-MA and comes above it, we've seen an average of 50-70% correction in btc. So according to past data, if again 50 w-MA comes above 20 w-MA, i'm expecting a correction of atleast 50% in the BTC.
This is what my TA is saying.

P.S. - This is for educational purpose only. #NFA #DYOR