Drawing Arrows

[DaveS]

Can someone please tell me where I'm going wrong here? I want to draw arrows on the price plot at each cross of two SMA's. The code below does draw one arrow, in the correct place, but it does not draw any historical arrows. Also, when it draws a new arrow at the next SMA cross, the one that was already on the chart dissapears!

protected override void OnBarUpdate()
{
PlotFast.Set(SMA(FastLen)[0]);
PlotSlow.Set(SMA(SlowLen)[0]);
if (CrossAbove(SMA(FastLen), SMA(SlowLen), 1))
{
DrawArrowUp("MyTag", true, 0, Low[0] - TickSize, Color.Blue);
}
if (CrossBelow(SMA(FastLen), SMA(SlowLen), 1))
{
DrawArrowDown("MyTag", true, 0, High[0] + TickSize, Color.Crimson);
}
}

[NinjaTrader_Bertrand]

Hi DaveS,

Please use unique tag id's for your arrows...you can easily achieve this by using this format - "MyTag" + CurrentBar

[DaveS]

Yes, I see, that works and so does CurrentBar.ToString().

You are appending an integer to a string, is this an implicit cast?

[NinjaTrader_JoshP]

Right. They will both work.