Infinte Loop

• 07/23/2018 at 9:20 PM #76554
  grimweasel47

  Hi all,

  My code has suddenly started returning ‘infinite loop’ error, even thought I have not changed the code?! It will not work in backtests, but will the original code still work in live trading? The strategy was very profitable but has lost 50% since this error appeared? Has there been a new release of PRT that is stopping older code from working???

  Many thanks

   

  Grim

  

  grimweasel47

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  07/23/2018 at 10:30 PM #76556
  GraHal

  Submit a Technical Report to PRT asap asking why are you NOW getting the infinite loop error message after the code has been running fine for X Months??

   

  

  GraHal

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  07/23/2018 at 10:36 PM #76557
  grimweasel47

  Thanks GraHal. Does that include PRT on IGindex? The report said they would only respond to executed trades? Seems back testing is not covered. I’ve submitted once but not received a reply!

  

  grimweasel47

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  07/24/2018 at 6:59 AM #76564
  GraHal

  grimweasel47 wrote:

  The report said they would only respond to executed trades? Seems back testing is not covered

  Yes I noticed that yesterday when I submitted a Technical Report (never noticed it before) and I took it to mean automatic trade execution … backtesting is a trade execution?

  I’ll let you know if / when I get a reply to my Technical Report about Even Trades on backtesting.

  

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  07/24/2018 at 7:30 AM #76566
  Vonasi

  grimweasel47 wrote:

  The report said they would only respond to executed trades?

  I’m guessing but I think they are just trying to clarify which type of report you should be sending as if you spot an issue or bug on a particular window then that is a different type of report than if you have weird results or errors from an auto-trading strategy. I guess it helps them get the problem to the right department quicker.

  Personally I think that the more choices you give someone the more chance there is of them choosing the wrong one and then the system is broken!

  

  Vonasi

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  07/25/2018 at 12:11 PM #76699
  grimweasel47

  Thanks guys. Still no luck and no response from PRT. I can’t understand why the code has suddenly started reporting this infinite loop error when nothing has changed in the code? Why does this error come about? Is it an errant ‘if’ command not closed off with an ‘endif’?

  

  grimweasel47

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  07/25/2018 at 2:14 PM #76718
  Vonasi

  Normally it is a FOR NEXT loop that is the problem.

  

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  07/25/2018 at 2:34 PM #76722
  grimweasel47

  The kind folks at IT-Finance came back to me. This may be instructive to others as it appears the new engine is less forgiving!

  Basically, he should replace the while… wend condition by a If… endif condition :

  while case <> 0 and time>= activationtime and daytrading=1 do //and time <=LimitHour do if levelhi>0 then buy size contract at levelhi stop endif if levello>0 then sellshort size contract at levello stop endif wend

  1 2 3 4 5 6 7 8

  while case <> 0  and time>= activationtime and daytrading=1 do //and time <=LimitHour do     if levelhi>0 then         buy size contract at levelhi stop     endif     if levello>0 then         sellshort size contract at levello stop     endif wend

  should be replaced with:

  if case <> 0 and time>= activationtime and daytrading=1 then//and time <=LimitHour do if levelhi>0 then buy size contract at levelhi stop endif if levello>0 then sellshort size contract at levello stop endif endif

  1 2 3 4 5 6 7 8

  if  case <> 0  and time>= activationtime and daytrading=1  then//and time <=LimitHour do     if levelhi>0 then         buy size contract at levelhi stop     endif     if levello>0 then         sellshort size contract at levello stop     endif endif

  Otherwise the code is looping in this section of code. The old engine ignored this error, but the new one is a lot cleaner.

  Thanks IT-Finance guys for solving the issue!

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  GraHal

  

  grimweasel47

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