Convert type void to double

[winja]

I am trying to display a dot above the high or below the low when the close[0] crosses the Bollinger bands. Here is example of the code I wrote:

[FONT=Courier New][/FONT][FONT=Courier New][SIZE=2][COLOR=#0000ff]protected[/COLOR][/SIZE][/FONT][FONT=Courier New][/FONT][FONT=Courier New][SIZE=2][COLOR=#0000ff]override[/COLOR][/SIZE][/FONT][FONT=Courier New][/FONT][FONT=Courier New][SIZE=2][COLOR=#0000ff]void[/COLOR][/SIZE][/FONT][FONT=Courier New][SIZE=2] OnBarUpdate()
{
Upper.Set(SMA(Period)[[/SIZE][/FONT][FONT=Courier New][SIZE=2][COLOR=#800080]0[/COLOR][/SIZE][/FONT][FONT=Courier New][SIZE=2]] + NumStdDev * StdDev(Period)[[/SIZE][/FONT][FONT=Courier New][SIZE=2][COLOR=#800080]0[/COLOR][/SIZE][/FONT][FONT=Courier New][SIZE=2]]);
Middle.Set(SMA(Period)[[/SIZE][/FONT][FONT=Courier New][SIZE=2][COLOR=#800080]0[/COLOR][/SIZE][/FONT][FONT=Courier New][SIZE=2]]);
Lower.Set(SMA(Period)[[/SIZE][/FONT][FONT=Courier New][SIZE=2][COLOR=#800080]0[/COLOR][/SIZE][/FONT][FONT=Courier New][SIZE=2]] - NumStdDev * StdDev(Period)[[/SIZE][/FONT][FONT=Courier New][SIZE=2][COLOR=#800080]0[/COLOR][/SIZE][/FONT][FONT=Courier New][SIZE=2]]);[/SIZE][/FONT]
[FONT=Courier New][/FONT][FONT=Courier New][SIZE=2][COLOR=#0000ff]double[/COLOR][/SIZE][/FONT][FONT=Courier New][SIZE=2] upperBand = Bollinger.Upper([/SIZE][/FONT][FONT=Courier New][SIZE=2][COLOR=#800080]2[/COLOR][/SIZE][/FONT][FONT=Courier New][SIZE=2],[/SIZE][/FONT][FONT=Courier New][SIZE=2][COLOR=#800080]14[/COLOR][/SIZE][/FONT][FONT=Courier New][SIZE=2]);
[/SIZE][/FONT][FONT=Courier New][SIZE=2][COLOR=#0000ff]double[/COLOR][/SIZE][/FONT][FONT=Courier New][SIZE=2] lowerBand = Bollinger.Lower([/SIZE][/FONT][FONT=Courier New][SIZE=2][COLOR=#800080]2[/COLOR][/SIZE][/FONT][FONT=Courier New][SIZE=2],[/SIZE][/FONT][FONT=Courier New][SIZE=2][COLOR=#800080]14[/COLOR][/SIZE][/FONT][FONT=Courier New][SIZE=2]);[/SIZE][/FONT]
[FONT=Courier New][/FONT][FONT=Courier New][SIZE=2][COLOR=#008000]// Paint a dot when price crosses Upper or Lower Bollinger band.
[/COLOR][/SIZE][/FONT][FONT=Courier New][/FONT][FONT=Courier New][SIZE=2][COLOR=#0000ff]if[/COLOR][/SIZE][/FONT][FONT=Courier New][SIZE=2] (Close[[/SIZE][/FONT][FONT=Courier New][SIZE=2][COLOR=#800080]0[/COLOR][/SIZE][/FONT][FONT=Courier New][SIZE=2]] > upperBand)
{
[/SIZE][/FONT][FONT=Courier New][SIZE=2][COLOR=#008000]// Paints a red dot on the current bar 1 tick above the high
[/COLOR][/SIZE][/FONT][FONT=Courier New][SIZE=2]DrawDot([/SIZE][/FONT][FONT=Courier New][SIZE=2][COLOR=#800000]"tag1"[/COLOR][/SIZE][/FONT][FONT=Courier New][SIZE=2], [/SIZE][/FONT][FONT=Courier New][SIZE=2][COLOR=#0000ff]true[/COLOR][/SIZE][/FONT][FONT=Courier New][SIZE=2], [/SIZE][/FONT][FONT=Courier New][SIZE=2][COLOR=#800080]0[/COLOR][/SIZE][/FONT][FONT=Courier New][SIZE=2], High[[/SIZE][/FONT][FONT=Courier New][SIZE=2][COLOR=#800080]0[/COLOR][/SIZE][/FONT][FONT=Courier New][SIZE=2]] + TickSize, Color.Red);
}
[/SIZE][/FONT][FONT=Courier New][SIZE=2][COLOR=#0000ff]else[/COLOR][/SIZE][/FONT][FONT=Courier New][/FONT][FONT=Courier New][SIZE=2][COLOR=#0000ff]if[/COLOR][/SIZE][/FONT][FONT=Courier New][SIZE=2] (Close[[/SIZE][/FONT][FONT=Courier New][SIZE=2][COLOR=#800080]0[/COLOR][/SIZE][/FONT][FONT=Courier New][SIZE=2]] < lowerBand)
{
[/SIZE][/FONT][FONT=Courier New][SIZE=2][COLOR=#008000]// Paints a blue dot on the current bar 1 tick below the low 
[/COLOR][/SIZE][/FONT][FONT=Courier New][SIZE=2]DrawDot([/SIZE][/FONT][FONT=Courier New][SIZE=2][COLOR=#800000]"tag2"[/COLOR][/SIZE][/FONT][FONT=Courier New][SIZE=2], [/SIZE][/FONT][FONT=Courier New][SIZE=2][COLOR=#0000ff]true[/COLOR][/SIZE][/FONT][FONT=Courier New][SIZE=2], [/SIZE][/FONT][FONT=Courier New][SIZE=2][COLOR=#800080]0[/COLOR][/SIZE][/FONT][FONT=Courier New][SIZE=2], Low[[/SIZE][/FONT][FONT=Courier New][SIZE=2][COLOR=#800080]0[/COLOR][/SIZE][/FONT][FONT=Courier New][SIZE=2]] - TickSize, Color.Blue);
}
[/SIZE][/FONT]

My question is: Since I want to compare a value Close[0], which is a double, with a method how do I convert it to a double. Or is this the wrong approach to take. Thanks in advance.

[NinjaTrader_JoshP]

That will not compile. You need to do:

[FONT=Courier New][SIZE=2][COLOR=#0000ff]double[/COLOR][/SIZE][/FONT][FONT=Courier New][SIZE=2] upperBand = Bollinger[/SIZE][/FONT][FONT=Courier New][SIZE=2]([/SIZE][/FONT][FONT=Courier New][SIZE=2][COLOR=#800080]2[/COLOR][/SIZE][/FONT][FONT=Courier New][SIZE=2],[/SIZE][/FONT][FONT=Courier New][SIZE=2][COLOR=#800080]14[/COLOR][/SIZE][/FONT][FONT=Courier New][SIZE=2])[/SIZE][/FONT][FONT=Courier New][SIZE=2].Upper[0][/SIZE][/FONT][FONT=Courier New][SIZE=2];[/SIZE][/FONT]

The [] indexing is to access the double value stored by the Bollinger band.

[winja]

Thanks Josh, that works