Problem with condition

• 07/11/2017 at 12:00 PM #40345
  Despair

  I have a strange problem. I want my condition to be true if a moving average goes flat (sideways). So i have something like:

  once i=0 if ema=ema[1] then i=i+1 endif graph ema as "ema" graph ema[1] as "ema[1]" graph i as "i"

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  once i=0 if ema=ema[1] then   i=i+1 endif graph ema as "ema" graph ema[1] as "ema[1]" graph i as "i"

  When i run the code the condition obviously never comes true since i remains zero all the time. Anyway when i look at the graphed variables the backtest shows many periods when ema=ema[1]. How can this be? Is that maybe that PRT intern calculates the emas with more than 5 digits and then cuts off the last digits when graphing them? This way there is a tiny difference between ema and ema[1] though graph shows the same value for them?

  This takes me to the question, with how many digits behind the comma is PRT calculating?

  

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  07/11/2017 at 1:51 PM #40355
  Despair

  Obviously there is a problem with hidden digits. PRT shows 5 digits but internally it must calculate with more digits. Does anybody know with how many?

  

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  07/11/2017 at 3:06 PM #40374
  robertogozzi

  Which TF did you use?

  I your assumption might be possible for very low TF’s, say 1 minute or lower, I think it would be extremely odd to have EMA’s matching the first 5 digits in a, say, 4-hour TF!

  

  robertogozzi

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  07/11/2017 at 6:54 PM #40381
  Despair

  I was using 5 minute TF. And it is definitely th case with some hidden digits. When you graph the variables it comes back sometimes as “0” and sometimes as “-0.00” so obviously there is something going on one doesnt see (again!).

  

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  07/11/2017 at 10:27 PM #40392
  robertogozzi

  I had to modify your code as follows to be executed:

  once i=0 ema = average[20] if ema=ema[1] then i=i+1 endif if i < 0 then buy 1 contract at market //useless condition just to add a BUY order endif graph ema as "ema" graph ema[1] as "ema[1]" graph i as "i"

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  once i=0 ema = average[20] if ema=ema[1] then    i=i+1 endif if i < 0 then    buy 1 contract at market  //useless condition just to add a BUY order endif graph ema    as "ema" graph ema[1] as "ema[1]" graph i      as "i"

  I run it on DAX 5-min TF and it was executed regularly, I found a match on Friday July 7th at 09:35 (gmt +2), as from the picture.

  Variable i was set at 11, so there must have been 10 matches before.

  Prices seem regular with the full 5 digits + 5 decimal digits.

  

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