Added SMA to buy and sell volume.
Added high volume indication in the form of a diamond above or below the volume indicator. This show when volume has been above a defined threshold.
In true TradingView spirit, the author of this script has published it open-source, so traders can understand and verify it. Cheers to the author! You may use it for free, but reuse of this code in a publication is governed by House Rules. You can favorite it to use it on a chart.