BBUpper(period [,deviations,offset]) - Returns the upper value of the Bollinger band envelope period: no. of bars used (typical is 20) deviations: no. of deviations (default is 2) offset: use values from 0-100
BBLower(period [,deviations,offset]) - Returns the lower value of the Bollinger band envelope period: no. of bars used (typical is 20) deviations: no. of deviations (default is 2) offset: use values from 0-100
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Portfolio123 Staff
Can you set the function such that it accepts "series" as an input, because I want to use it to calculate BB band for $VIX. If it is not possible, can you add a new math function that can calculate the standard deviation of any series (I want to calculate $VIX). Now the available function can only calculate standard deviation of percentage price change, not the level of price. Thanks for your consideration.
Can you set the function such that it accepts "series" as an input, because I want to use it to calculate BB band for $VIX. If it is not possible, can you add a new math function that can calculate the standard deviation of any series (I want to calculate $VIX). Now the available function can only calculate standard deviation of percentage price change, not the level of price. Thanks for your consideration.
