How to create a new technical indicator

[DGabri]

Hello everyone, I can't seem to figure out (checked the doc which is not clear) how to plot custom data when registering a new custom indicator. The problem is that the indicator expects OHLC data from the chart instance but i want to plot let's a timeseries based on a specific API call to display for example a line. Does someone know the answer to my question? Another issue is that after every chart updateData() call the technical indicator seems to update, so if i have a websocket connection update mechanism I don't want to poll the API for the indicator after every chart update.

Thanks for the help!