Bollinger Bands index formula calculation

Bollinger Bands index formula calculation

　　1) Calculate MA

　　MA=Sum of closing prices in N days ÷ N

　　2) Calculate the standard deviation MD

　　MD = the sum of the two square roots of N days (C-MA) divided by N

　　3) Calculate MB, UP, DN lines

　　MB=(N-1) day MA

　　UP=MB+2×MD

　　DN = MB-2 × MD

 

N refers to the number of candlesticks, which can be a day or an hour