Passing a Period.Type into the Indicator for Additional Instrument

[pretender]

I know I can pass through a symbol for an additional instrument into an indicator by:

declaring a string input variable
eg. private string symbol = @"SPY"

and then adding the new instrument in Initialize
eg. Add(symbol, Period.Type.Day, 1)

And that way I can manually change what additional instrument I add into the indicator every time I set my parameters for an indicator.

But how do I change the Period.Type? It's not a string, so I can't just enter in another string parameter/variable.

[BigRo]

im sure there is a more convenient way but what u can do is to use(depending on how many periodtypes u acutally wanna have) either a bool or a list.

if for example ur only interested in alternating between day and minute bars u could just use a bool that u would set in the parameters to true (for minute) and false for day. and then use a simple if(bool) then add period.minute and if(bool==false) add period.day statment or something like that. the actual value for the periodtype can then be inserted by a simple int parameter.

for a list dropdown u would use something like this

public enum PeriodTypes
{
Day,
Minute,
Range
}

and this for you parameters

[NinjaTrader.Gui.Design.DisplayName("Periodypes"), GridCategory("Parameters")]
public PeriodTypes PeriodTypes
{
get
{
return this.periodtypes;
}
set
{
this.periodtypes = value;
}
}

and then again use simple if statements.

if(PeriodTypes== PeriodTypes.Day)
Add()

make sure to use
using System.Collections.Generic;
declaration (first region) when using a list.