iEnvelopes does not accept negative shift

MisterDog 2013.05.16 17:17

How do I get iEnvelopes to use a negative shift?

   int maPeriod = 24;
   double deviation = 0.15;
   int shift = 10;  // this works
   int shift = -10; // this does not work
   
   double envHigh = iEnvelopes(NULL, 0, maPeriod, MODE_SMA, shift, PRICE_MEDIAN, deviation, MODE_UPPER, 0);
   double envLow  = iEnvelopes(NULL, 0, maPeriod, MODE_SMA, shift, PRICE_MEDIAN, deviation, MODE_LOWER, 0);

Negative shift works here...

qjol 2013.05.17 00:12 #1

double envHigh = iEnvelopes(NULL, 0, maPeriod, MODE_SMA, 10, PRICE_MEDIAN, deviation, MODE_UPPER, -10)

MisterDog 2013.05.17 02:36 #2

qjol:

double envHigh = iEnvelopes(NULL, 0, maPeriod, MODE_SMA, 10, PRICE_MEDIAN, deviation, MODE_UPPER, -10)

same result as...

double envHigh = iEnvelopes(NULL, 0, maPeriod, MODE_SMA, 0, PRICE_MEDIAN, deviation, MODE_UPPER, 0)

and double envHigh = iEnvelopes(NULL, 0, maPeriod, MODE_SMA, 0, PRICE_MEDIAN, deviation, MODE_UPPER, -10) returns 0.00000000

Simon Gniadkowski 2013.05.17 05:18 #3

MisterDog:

How do I get iEnvelopes to use a negative shift?

Negative shift works here...

It can't work . . . plot it manually on a chart show a screenshot and tell us what the values are for bar 0 . . . and then tell us what the values are for bar 11.

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