The official documentation for AgenaScript and the documentation for all indicators in AgenaTrader can be found here on these two websites:
AgenaScript: https://script.agenatrader.com/
Indicators: https://indicators.agenatrader.com/
Because we get these questions quite often, we would like to link this information here for you, as some old scripts or old descriptions still contain links to the German or English version of the documentation on GitHub.