Troubleshooting

The build fails, or the indicator does not appear.

The build fails

VolSysAPI.dll and VolumetricaCore.dll were not found

The project looks for the two libraries in the folder Deepchart is installed in. Pass your folder:

dotnet build src/DeepchartIndicators.csproj -p:DeepchartDir="D:\Apps\Deepchart"

or change DeepchartDir in the project file. An old version of Deepchart does not have these libraries: update it.

The dll cannot be written

The output folder is Documents\Deepchart\Indicators. If the build cannot write there, check that the folder exists and that no other program keeps the file open.

'Structure' is an ambiguous reference

VolSysAPI.Structure (bars) and VolumetricaAPI.Connection.Structure (trades, order book) have the same name. Use an alias for the second one:

using Feed = VolumetricaAPI.Connection.Structure;

The indicator is not in the list

The developer id is missing or wrong

The most common cause. The build warns when the id is still YOUR-DEV-ID, and the log of Deepchart says DeepchartDevId ... is not the one of the user. See Developer id.

The class has no Register method

An indicator is listed only if it has a public static method named Register returning IndicatorDescriptionBase.

The dll is in another folder

Deepchart loads local indicators from Documents\Deepchart\Indicators. Check OutputPath if you changed it.

The indicator throws when it is created

The constructor and the property initializers run when the list is built. Keep them simple and do the work in OnLoad.

The indicator is on the chart but draws nothing

• No call was asked for. OnOpenCall, OnCloseCall, OnEndCall are Off by default. Set them in OnSet.
• The points are hidden. A point added with IsHidden: true stays hidden until you set IsHidden = false.
• The series is not enabled. definition.BaseSeries is null when Enabled is false.
• An annotation was not added. Creating it is not enough: call VAn.AddAnnotation(group, annotation).
• The annotation is in the wrong place. With absolute coordinates the bar i is at X = i + 1, and Y is a value of the axis of its area. Set Area = ChartArea to draw in the area of the indicator.
• The state was not reset. After a parameter change the indicator is calculated again from OnLoad. Fields which keep their old values give wrong results from the second calculation on.

The values are wrong on the last bar

The last bar is still open. OnClose is not called for it: update it in OnEnd, which is called after the history and after every batch of realtime updates.

Volume by price is empty

Set NeedVbp = true in OnSet, and check PriceList and VbpListAll for null: some symbols and data feeds do not have it.