I am trying to understand how the SMA indicator (supplied with NT6.5) works so I can write my own indicator (actually a port of DemandIndex from the AmiBroker AFL language).
Can you answer me what is Value ? I can't find it in the pdf userguide to NT v6 (so presumably it is not a system reserved word). Neither is it declared in the SMA indicator source code so it is not a local variable.
It is referenced in these two ways
1: double last = Value[1] * Math.Min ....
2: Value.Set(last + Input[0] ...... )
In 1: it would appear to be an array type (IDataSeries) but in 2: it appears to be a single variable (double)
Also, where does the SimpleMovingAverage code initially add all the prices?
I would have thought that the code would run along the following lines:
Initialise() { double last=0; // running sum of the prices // now to add up all the prices for an initial total. for (int count=0; count<Period; count++) { last=last + Input[count]; } } OnBarUpdate() { // And now on each bar update, add price of new bar and subtract // price of last (Period) bar and divide by Period. if (CurrentBar >= Period) { last = (last + Input[0] - Input[Period]) / Period; } // Plot a line Plot0.Set(last); } // end
*** Cheers and thanx, MarkBN
BTW: I did search the forum to see if someone had perhaps already
ported this indicator, but sadly for me, it appears no.
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