Is is possible to add a study/indicator to the chart?

[timocov]

How to add a study/indicator to the chart?

[timocov]

This is related to #633.

Yes, it is possible.

lightweight-charts knows nothing about what exactly you display in the chart - for the library all data sources are series (with different types of the data/displaying).

If you'd like to add several indicators to the chart, just create several series (one series for one single-valued study) with their own options and study/indicator's data.

If your study has several outputs (like Bollinger Bands), you can create several series - one series for one study output/plot. But in this case you need to pay attention on what price scale that series are using - quite probably you want to be sure that all a study's outputs are attached to the same price scale. To do it, use priceScaleId (all outputs should have the same price scale id in this case, regardless it is 'right'/'left' or a random overlay price scale id).

[big-javascript-fan]

Thank you so much. timocov.
May I get the sample code or any example?
Thanks

[timocov]

@big-javascript-fan I think that the simplest study is Volume study and you can check it here https://jsfiddle.net/TradingView/cnbamtuh/. I believe that all other studies could be done in similar way - you just need to process your data via a study function (you can use any available in npm library if you'd like) and then provide the result of this data to lightweight-charts. For example https://codesandbox.io/s/brave-silence-sg5h9?file=/src/index.js.

[aradhya-tiwari]

https://www.youtube.com/watch?v=NlHjhmIe1EI

https://jsfiddle.net/adrianntf/6qea5ytv/

[dokocat]

Is there a way we can get access to the regular indicators provided my tradingview pro charts? Would love to be able to offer users a dropdown they could select different indicators.

[romfrancois]

Lightweight Charts doesn't have the same concept of indicators as the other library.
With Lightweight Charts you have to implement any indicator you'd like to offer/use. Most if not all formula can be obtain online on websites such as Investopedia. Given you're handling already the data you should be able to implement what you want.

[dokocat]

Thanks for the info sir! In the upcoming plugins system would it be possible to implement community made indicators?

[romfrancois]

Yes most likely some indicators could/will be provided as plugins while some others might be developed by some other devs.