How to Stop an Indicator from Running on Every Tick and Execute Only on New Can

• 01/06/2025 at 9:25 AM #242209
  shiv55

  Description:
  I am working on a custom indicator in ProRealTime, and I want it to execute only once when a new candle is formed, rather than recalculating on every tick. Currently, the indicator logic is running for every tick movement, which is not what I intend.

  Here’s the logic I’ve implemented:

  // Declare a variable to store the last processed bar index
  if not defined lastBarIndex then
  lastBarIndex = 0
  endif

  // Check if a new candle has formed
  if barindex > lastBarIndex then
  // Indicator logic
  randomValue = random // Example: Generate a random number

  // Update the last processed bar index
  lastBarIndex = barindex
  endif

  // Return the result
  RETURN randomValue

  However, the issue is that the random value (or any calculation) is still being generated on every tick movement, instead of being updated only once per new candle.

  Questions:

  1. How can I ensure the indicator runs only once per new candle?
  2. Is there a specific way to define or handle persistent variables (lastBarIndex) to prevent them from being reinitialized on every tick?
  3. Is my approach of using barindex to track candle changes correct, or is there a better method?

  I’d appreciate any guidance or examples from the community. Thank you!

  

  shiv55

  Participant

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  01/06/2025 at 12:14 PM #242216
  shiv55

  shiv55 wrote:

  Description:

  I am working on a custom indicator in ProRealTime, and I want it to execute only once when a new candle is formed, rather than recalculating on every tick. Currently, the indicator logic is running for every tick movement(i’m using 200 tick based chart), which is not what I intend.

  Here’s the logic I’ve used to stop executing my whole code on every tick movement:

  if opentimestamp<>$lastopen[0] then
  $lastopen[0]=opentimestamp
  drawhline(high[2])
  endif

  However, the issue is that ‘horizontal line’ is automatically forms and being deleted within few milliseconds of new candle start.Even i have tried with ‘DRAWSEGMENT’,DRAWARROWUP’ etc same thing happening.Since my indicator to much resource heavy i want it run on new candle only and older drawing should remain as it is.

  I’d appreciate any guidance or examples from the community. Thank you!

   

  

  shiv55

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  01/06/2025 at 4:40 PM #242226
  robertogozzi

  IsLastBarUpdate might be what you need:

  defparam DrawOnLastBarOnly = true if IsLastBarUpdate then drawhline(high[2]) endif return

  1 2 3 4 5

  defparam DrawOnLastBarOnly = true if IsLastBarUpdate then    drawhline(high[2]) endif return

   

  

  robertogozzi

  Moderator

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