Support area graphs (like Bollinger Bands)

[xmatthias]

Is your feature request related to a problem? Please describe.
Current graphs don't support Area charts.

These would be useful for things like Bollinger Bands (or 70/30 lines in RSI subplots).

Details

It's currently unclear how eCharts can support this - as current solutions / samples shift the base for the lower chart.

Research indicates that it might be possible by using a custom series for this - however further research is absolutely necessary.

There are also open issues (and others) which discuss supporting area-charts natively - but i don't think implementation of this are very far yet.

[devsmitra]

@xmatthias
Just a thought can we add a tradingview light chart. I have added a package link for reference. because most users are familiar with tradingview this could help.

https://github.com/tradingview/lightweight-charts

[xmatthias]

from a license perspective - most likely no. (there's also very little information on the proprietary license that would apply to this).

We'd have to use the "lowest" version available lightweight chart, as all others would not allow us to distribute it the way we are.
You'll therefore have very little benefit from it, but all the drawbacks (no synced / linked subcharts like RSI, ...).
That limitation applies to all Free libraries from tradingview.

It'd not look or feel like the tradingview library you're accustomed to.

[workingxx92]

@xmatthias .

How to config fill area bg color for senkou_a to senkou_b?
Thanks

[xmatthias]

FreqUI currently does not support band-like graphs.

[workingxx92]

Did you have plan for it?