Detect last bar/Draw only on last bar?

[-kman-]

Hello,

I want to draw some shapes *after* the last bar paints, as below. Because it paints at the end, I do a bunch of calculations during previous bars but I don't actually need to paint anything. currently I've got something like this:

if(State == State.Realtime)
  Paint();

Which is efficient, but it doesn't paint until the next bar closes. So if i'm looking at the 15 minute chart it could take up to 15 minutes before i see any shapes. I can paint on every bar, but that slows things down considerably.

Is there a way to trigger a draw immediately after going realtime, to a value i can check to see if the current bar is the last available one?

So something like this:

  if(isLastHistoricalBar || State == State.Realtime) 
    Draw();

I've tried:
Calling OnBarUpdate manually on state change to realtime.
Detecting if the bar time is < 10 minutes from DateTime.now. This works except when I'm viewing historical data during market replay then nothing paints.

[NinjaTrader_Jesse]

Hello -kman-,

You can use if(CurrentBar == Count - 2) to do that.