Indicate volume momentum, and help you define divergences on volume. The goal is to have an idea and represent in another form volumes and kept eyes on volume momentum on a certain period. RSI is an indicator about the strength, I keep the oversold/overbought thresholds. I think it still makes sense to interpret.
the calculations is simple, we use the average volume up (avg_vol_up) and average volume down (avg_vol_down) over the period.
then calculate the relatives strength : ( avg_vol_up / ( avg_vol_up + avg_vol_down ) ) * 100
The period is 14 by default. The period is used for calculating mean.
I also add MA it helps to have a global look on the indicator.
In my code I used the idea of padronhosnai in his code "positve/negative volume" to get volumes in the right form. For pictures I also use his indicator it's the one above.
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Huge mistake !
"Math.sum" already calculate the mean. So it was incorrect to divide again by the length