RSA(Close, 2, 3)[1] doesn't seem to work

[bchirhart]

I am trying to set up an indicator that plots a line and plays a sound when the current RSI[0] is above say, 30 and the previous candle RSI (RSI[1] correct?) is at 1 or less.
This code looks like it should work to me according to the manual and the tutorials, but when I add the RSI[1] the graph is blank. If I remark that out, then the RSI[0] works just fine. I've tried porting the values to the output window, but when I include RSI[1] I get the following output regardless of the RSI value...

The current RSI value is 1.3983
Error on calling 'OnBarUpdate' method for indicator 'PrintRSI' on bar 0: You are accessing an index with a value that is invalid since its out of range. I.E. accessing a series [barsAgo] with a value of 5 when there are only 4 bars on the chart.

Again, if I remove RSI[1] then the value of RSI[0] prints fine. Here is the code I am trying to get to work:

            ///  Just debug code here
            Print ("RSI currently is " + RSI(Close, 2, 3)[0]);
            Print ("RSI 1 currently is " + RSI(Close, 2, 3)[1]);
            
            if (RSI(Close, 2, 3)[1] <= 1)
                && RSI(Close, 2, 3)[0] >= 30)
            {
                PlotHigh.Set(1);
                PlaySound(@"C:\Program Files (x86)\NinjaTrader 7\sounds\Connected.wav");
            }
            
            if (RSI(Close, 2, 3)[1] >= 99)
                && RSI(Close, 2, 3)[0] <=70)
            {
                PlotLow.Set(1);
                PlaySound(@"C:\Program Files (x86)\NinjaTrader 7\sounds\Connected.wav");
            }

[sledge]

This should help:

http://www.ninjatrader.com/support/forum/showthread.php?t=45086&highlight=accessing+index

[NinjaTrader_Bertrand]

Welcome to our forums bchirhart, this is a common situation newer coders run into which can be resolved easily with the concepts from this tip :

http://www.ninjatrader.com/support/forum/showthread.php?t=3170

[bchirhart]

Yep - that got it! Thanks. One step closer.

I did find however that RSI[0] and RSI[1] were displaying the same number - so I changed it to RSI[2]. Not sure if I am seeing the correct results or not, but it seems to be "mostly" working. Sometimes the bars double fire and the RSI[2] output is the same for the second bar as it was for the first. I would think that RSI[2] would be the old RSI[0], correct? OR - should I really be using RSI[1] and I just read my initial results incorrectly?

[NinjaTrader_Bertrand]

Glad to hear that - would RSI[0] would give you depends on the CalculateOnBarClose setting you use for your script : http://www.ninjatrader.com/support/h...onbarclose.htm

With this set to 'true' - index 0 is the value of last completed bar, on 'false' the value for the currently developing bar, so updated on each incoming tick.

[bchirhart]

Thanks! That is showing what I would suspect. I really appreciate it Bertrand and Sludge.