Past Plot() values

[Zeos6]

Hi,

A quick question.
If a DataSeries object is associated with each Plot, and is held in the Values collection, can I access past values of the plot as follows?

Add(new Plot(Color.Red, "PlotA"));
Add(new Plot(Color.Blue, "PlotB"));
Add(new Plot(Color.Green, "PlotC"));

Values[0]{3] the value of PlotA 3 bars ago
Values[1]{1] the value of PlotB 1 bar ago
Values[2]{0] the current bar value of PlotC

Thank you.

[NinjaTrader_RyanM1]

Hi Zeos6,

Yes, Values collection can be used that way, but there is minor error in your example. Brackets are used there instead of {

Values[0][3] the value of PlotA 3 bars ago
Values[1][1] the value of PlotB 1 bar ago
Values[2][0] the current bar value of PlotC

[Zeos6]

Thanks Ryan. Sorry for the typo and thanks for catching it.

[Zeos6]

Ryan, one more question please.
Can you reassign a previous plot value? Say I have a plot value of 3 on the previous bar and now on the current bar I want to change it to 5. Can I simply say, Values[0][1] = 5? Please advise. Thanks.

[NinjaTrader_RyanM1]

Yes, you can but not like that. There is an additional overload in Set that allows you to set to a prior value.

DataSeries.Set(int barsAgo, double value)
You can also set the value for historical bars by including a "barsAgo" value that represents the number of bars ago that you want the double value to be stored at.

[Zeos6]

Thanks Ryan. So what would this look like for a Plot? Would you use Values[0].Set(3, 5.0)?

[NinjaTrader_RyanM1]

Yes, works the same for plots and data series. A plot uses same structure as data series but has capability of setting a visual.

[koganam]

Ryan, one more question please.
Can you reassign a previous plot value? Say I have a plot value of 3 on the previous bar and now on the current bar I want to change it to 5. Can I simply say, Values[0][1] = 5? Please advise. Thanks.

Actually you can do that assignation, as the Values collection is read/write, but that is not the approved NT method: they recommend you use an override on the Set command.

[Zeos6]

Hi Koganam,

So what you are saying is that Values[0][3] = 5 will work but the preferred way is Values[0].Set(3, 5.0). Is that correct?

[koganam]

Hi Koganam,

So what you are saying is that Values[0][3] = 5 will work but the preferred way is Values[0].Set(3, 5.0). Is that correct?

Pretty much, yes.