PlotBrushes

[rockmanx00]

I am playing around with Plots using the example under PlotBrushes. I have basically made 2 EMA ribbons that will change color based on if it's rising or falling using this code within OnBarUpdate():

for (int i = 0; i < PlotBrushes.Count(); i++)
{
PlotBrushes[i][0] = (i < numberOfEMAPerRibbon) ? (IsRising(Values[i]) ? EMA1RibbonUpColor : EMA1RibbonDownColor) : (IsRising(Values[i]) ? EMA2RibbonUpColor : EMA2RibbonDownColor);
}

This gives the ribbons one of two colors depending on if it's rising or falling.
I wanted to add buttons to change the plotBrushes color to transparent, or if it is already transparent, change it back.

Can I use PlotBrushes[0][0] = Brushes.Transparent in this case? I tried and it's not working?
I have succeeded in hiding EMAs with a button before with Plots[0].Brush = Brushes.Transparent; but that is not working in this case either.

Any idea if I'm doing something wrong, or I'm just going about this the wrong way?

[NinjaTrader_Jesse]

Hello rockmanx00,

You can use PlotBrushes for that use, you would have to loop over the bars and supply an index to PlotBrushes[0][index] to set each bars color to transparent or some other color.

[rockmanx00]

Ok. I tried that but couldn't get it to work. Then again I did it the other way around with PlotBrushes[index][0] so I'll try again.

[NinjaTrader_Jesse]

Hello rockmanx00,

That is why I had specified Index in that location, the first brackets are the plot index. You need to use 0 if its the first plot.

[rockmanx00]

and the [index] would be the barsago portion of it? So I have to change the color for every section of the plotbrush[0]?

[NinjaTrader_Jesse]

Hello rockmanx00,

Right, its [plotindex][barsago]

[rockmanx00]

I'm getting an Unhandled exception error. Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index.

I didn't even loop. I just tested with PlotBrushes[0][1]= Brushes.Transparent;
The only number that doesn't give an error is PlotBrushes[0][0]= Brushes.Transparent; but it doesn't seem to make the plot transparent at all.

[Dudley]

i have some custom indicators for those willing

[NinjaTrader_Jesse]

Hello rockmanx00,

You are trying to se the 1 bars ago value on the primary plot, if you did that on bar 0 that is not valid. You would have to have a condition like this before that code

if(CurrentBar < 1) return;

[rockmanx00]

Huh....I hadn't even noticed I didn't have that on. I normally do on most of my code. I will try this again and figure out the logic for looping. If I'm using a button to activate the loop to make all the already loaded plots transparent, does that matter? It doesn't start as if it's loading the bars from the beginning right? I would think that since the bars are all loaded, you could do something like PlotBrushes[0][5] = Brushes.Transparent to change the section 5 bars ago to transparent without having an out of bounds array.

[NinjaTrader_Jesse]

Hello rockmanx00,

If you are trying to use a button to control plots I would suggest stating from a known working example, you can see the following which hides plots using a button. https://ninjatraderecosystem.com/use...ect-invisible/

[rockmanx00]

I do have a working example, from which I copied the button logic. The only difference in my case is that the original buttons I use to hide the EMAs simply uses Plots[0].Brush = Brushes.Transparent to change it. That works for me with that simple EMA. I tried that with this case but it didn't work. I'm assuming it's different since I'm using PlotBrushes [0][0] to create the plot colors in the first place.

I will look at the example you provided again to see if I can gain any other insight from it. Thank you.

[NinjaTrader_Jesse]

Hello rockmanx00,

For the purpose of hiding plots I would suggest using the indicators IsVisible property like the sample I linked, that is a lot less resource use and works over large bar sets where PlotBrushes would require looping.

[rockmanx00]

Ok. Good to know. I will check that out. Thank you.

[rockmanx00]

Looking at the sample, how exactly would I apply that to Plots or PlotBrushes? The example shows how to do it with draw objects, but .IsVisible does not seem to apply to Plots or PlotBrushes directly.