Baseline series type

[alekiv]

Is it possible to fill Area from predefined level (ex. 0)?
If you draw graph with negative values it currently fills area up from minimum value.
It maybe will be more logical to fill are from maximum to minimum.

https://jsfiddle.net/axtm3wr0/

[timocov]

It looks like Baseline chart type (you can see it on www.tradingview.com/chart).

[alekiv]

It looks like Baseline chart type (you can see it on www.tradingview.com/chart).

Yep, it is.

[thanhlmm]

In fact, I'm working with this with the interface in like:

basePrice: number;
underBaseTopColor: string;
underBaseBottomColor: string;
underLineColor: string;

It might not fit in future but feel free to give me suggetion

[timocov]

At the time in charting_library for baseline chart type we have the following properties, probably we can use some names/properties from them:

• baselineColor - the color of baseline line
• topFillColor1 - the start color of top area
• topFillColor2 - the end color of top area
• bottomFillColor1 - the start color of bottom area
• bottomFillColor2 - the end color of bottom area
• topLineColor - the color of top line (above the baseline)
• bottomLineColor - the color of bottom line (below the baseline)
• topLineWidth - line width of top baseline
• bottomLineWidth - line width of bottom baseline
• baseLevelPercentage - percentage value of baseline, it might be from 0 to 100 and it is based on the current viewport, not on absolute price value

[thanhlmm]

All make sense except baseLevelPercentage I think the base ine determined by price is more useful and configruable than level percentage. So my suggestion is basePrice
baselineColor => we can remove it since dev has the option to add price line manually with addPriceLine

[timocov]

All make sense except baseLevelPercentage I think the base ine determined by price is more useful and configruable than level percentage. So my suggestion is basePrice

@thanhlmm Yeah, probably we can make it configurable and do something like baseValue: { type: 'price', price: number } for now? In the future, if we'll decide to add new type of baseline value we can easily without a breaking change add it.

Also, I think it should be a different chart type with their own options (not extending the current one like line or area). Just to make it clearly and explicitly.

What do you think?

[thanhlmm]

Agree on both of your ideas

[timocov]

Fixed in #813