I am fundamental analyst, and I want to be a quant analyst.  
 
I am doing the studies on BIAS. And I have a problem for calculation.
 
The bias = (Close price-MA)/MA * 100%, and the bias change with the MA, since we can choose the different period limit, ex. 10 days, 60 days, etc.
 
I will get the different bias rates, and with each rate, the price has the possibility to rebound. I will calculate the possibility for each bias rate.  
 
SO does someone have any idea for the calculation?

we are in france we speak french