[Feature] Ability to pass custom indictor data

[The-Mr-L]

Hey and thanks for sharing!
I wonder how difficult it would be to implement a way for users to pass extra data for drawing like a list of doubles which length matches the candles list. this will make it easy to create custom on chart indicators. In my use case I already have calculated the indicators I use in my backend so it would be great I could just reuse them. anyway if this is not in the scope or vison of your project please let me know thanks :)