Desktop only features

What makes an indicator a desktop one.

Some members of the API work only on the desktop chart. They are marked with the [DesktopOnly] attribute. An indicator can use them: it compiles and runs on your chart as usual.

The consequence is for the whole package: when any indicator of a package uses a desktop only member, the package is calculated on the desktop, never on the server. Calling it, reading it, overriding it or implementing it all count as using it.

Chart API (VAn)

Member	Why	Use instead
RebuildDom()	the order book exists only on the desktop
SetCalculateAggrTrades()	aggregated trades are built only on the desktop
SetNeedPullbackBar(), PullbackBar, PullbackSourceInfo	the pullback bar is built only on the desktop
GetBarVars(), GetVolumeVbp(), GetMinuteVbp()	secondary bars of the chart	BarVars
GetParamsById(), GetSeriesValueById()	the other indicators of a chart are known only by that chart
RequestResolution(string Symbol, ...)	data of another symbol	RequestResolution(ParamType, Param1, Param2) for the same symbol
GetColorForTheme()	returns the resolved color	GetColorRefForTheme()

Indicator

Member	Why
OnBook, OnBookCall	order book updates
OnResizeAxis, OnResizeCall	the axes are resized by the chart of each user
OnFundInfoCall	fundamental data
TradingApi and every member of ITradingAPI	orders and positions belong to the user

Drawing

Member	Why
IChartSeries.IncludeInResize, UseAxesWithSpace, IniPlotIndex	options of the series of the desktop chart
IAnnotation.TextWidth, TextHeight	a text is measured only where it is drawn
IAxis.Minimum, Maximum	calculated by the chart while it draws

Trades of the history

One case is a value and not a member:

OnTickCall = CallHandler.HistRT;

The server calculates the history from the bars and does not replay the trades. An indicator which asks for the trades of the history is treated as a desktop one. Use CallHandler.RT and take the history from the totals of the bars (VolTotList, volume by price).

Mixing indicators

The rule applies to the package, not to the single indicator. Keep the desktop only indicators in a separate dll when you want the others to be calculated on the server.