How do I convert / use a 'double' variable with 'Rising / Falling'

[KLG08]

I started with an existing Indicator (HMAMultiColoredPlot) that works fine using 'if (Rising(HMA(Period)))' when ploting on the price pane 1.

I plot a simple MACD crossing over/under an HMA line (named TrendLine) on the price pane & it works great. Now I'm trying to have that same 'TrendLine' line to change colors as it Rises / Falls using the 'Rising' or 'Falling' function.
if (Rising(TrendLine)) where
double TrendLine = (HMAvalue + (MACDiffValue * MDiffMult));

How do I convert 'TrendLine' so I don't have all these errors:
- Invalid Argument
-Cannot convert from 'double' to 'NinjaTrader.Data.IDataSeries'
-Cannot apply indexing with [] to an expression of type 'double'

I have been using Ninja for 2.5 years but have not Posted very many Threads so if anyone has tips on how to post questions correctly I open to learn that also.

[NinjaTrader_Austin]

KLG08, currently TrendLine just stores a single value which changes for every bar. You will need to start working with DataSeries and change TrendLine to a DataSeries in order to achieve what you're looking to do. This reference sample, called Using a DataSeries Object to Store Calculations, should help you on your quest.

[KLG08]

Austin,thank you for your quick response.

I tried following the example & cleared up most of the errors but I still come back to the basic 'conversion' problem, & now it says 'cannot convert from 'NinjaTrader.Data.DataSeries' to NinjaTrader.Indicator.IndicatorBase'.

I'm not sure what to substitute in place of 'new' in the "
myDataTrendLine = new DataSeries(TrendLine); "

Also not sure what I'm doing wrong when I try to convert my indicator TrendLine into DataSeries.

[eDanny]

Instead of using this to create the DataSeries:

myDataTrendLine = new DataSeries(TrendLine);

try this:

myDataTrendLine = new DataSeries(this);

then in code to assign the TrendLine variable value to the DataSeries:

myDataTrendLine.Set(TrendLine);

[KLG08]

Thank you eDanny and NinjaTrader_Austin for your help it works.