Can't apply indexing to a Double

[Taddypole]

I'm working with the BollingerBand MACD indicator and want to apply some moving average filtering. To do this I need to work with dataseries data.

I have started a new indicator and am building it from what I know to what I don't know.

In the code attached, I can get the MACDStrength, Avg and SDev variables to calculate but am having problems with the upperBand variable.

I get the "Cannot apply indexing with [] to an expression of type 'double'" message.

I want "upperBand" to be a dataseries but don't know how to get there????

Help please..
taddypole...

[eDanny]

Please try this:

upperBand.Set(Avg[0]+(numStdDev*SDev[0]));

Dan

[NinjaTrader_Tim]

Hi Taddypole,

Your line here does not made logical sense...
upperBand.Set(Avg+(numStdDev*SDev[0])[0]);

breaking it down, you are trying to index the values...
(numStdDev*SDev[0]) which is a double, not a data series

Are you perhaps meaning to use....
upperBand.Set(Avg[0] + numStdDev*SDev[0]);

[Taddypole]

yes..

Thank you both, that is what i was trying to accomplish....

taddypole....

[Taddypole]

Can someone tell me how to change the "DashStyle" of the Plot conditionally?

In the attached code, on line 87 i've attempted some code but am getting errors.

[NinjaTrader_Bertrand]

Unfortunately you could not change the style of the plot dynamically, you could just use a second plot with another style set in Initialize().

[Taddypole]

Bertrand,

Do you have an example of using a second Plot with another style set?

I'm not sure if i understand how this would work.

Also,

What are the rules regarding multiple plots in an indicator and which ones are underneath and which ones are on top? Ive created an indicator with several plots and it appears that some of the plots that should be in the background are bleeding through and are covering up the plots that should be on top.

I assume its the order of the Add plot statements in the "protected override void Initialize()" section.

Regards,
taddypole...

[eDanny]

You can use Reset() to stop one plot while plotting another:

if(x == y)
{
Values[0].Set(Close[0]); Values[1].Reset();
}
else
{
Values[1].Set(Close[0]); Values[0].Reset();
}

[NinjaTrader_Tim]

Hi Taddypole,

An example of setting to DashStyle can be found here: http://www.ninjatrader.com/support/f...ead.php?t=3228

Thought the main topic of that post is different it will give you a good example.