Looking for a function, which can tell if there is an event happend in the last

• 12/04/2024 at 7:27 PM #241118
  thomas2004ch

  For example, I will check if in or within the last n days the SMA(5) crosses over the SMA(10).

  

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  12/04/2024 at 7:53 PM #241119
  LucasBest

  You can ever use Barssince if you want to know when it happened last time (and then check if it is within the last n bars,

  https://www.prorealcode.com/documentation/barssince/

  or Summation to check if it happened at least once within the last n bars

  https://www.prorealcode.com/documentation/summation/

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  12/05/2024 at 10:11 AM #241132
  druby

  Here’s an example of using BARSSINCE and SUMMATION. This may not be the only way to do this.

  defparam drawonlastbaronly = true //constants daysBack = 1 // number of days back or maximum bars in chart! // indicators sma5 = average[5,0](close) sma10 = average[10,0](close) // crossover condition c = sma5 crosses over sma10 // offset to last crossover Clast = barssince(c,0) // crossover bar Xbar = (barindex-Clast) //drawtext("#Xbar# crossovers",0,-60)anchor(top,xshift,yshift) // threshold limit bar Lbar = barindex - (barssince(day<>day[1],daysBack-1)-1) //drawtext("#Lbar# threshold limit bar",0,-60)anchor(top,xshift,yshift) // drawing! // if theres at least one crossover after threshold limit then display text if Xbar > Lbar and cLast > -1 then // draw last crossover line drawVline(Xbar) coloured("red") style(dottedline,1) // crossover line // draw text bi = barindex // as a user variable dif = Xbar-var // difference between xover offset and threshold drawtext("Threshold at bar #var# SMA5 last crossed over SMA10 at bar #Xbar# , #dif# bars from threshold ",0,40, dialog,standard,20)anchor(bottom,xshift,yshift) drawtext("Also, last crossed over is #Clast# bars back from current bar #bi# ",0,20, dialog,standard,20)anchor(bottom,xshift,yshift) endif // draw threshold limit line var = barindex - (barindex - Lbar) // threshold bar drawVline(var) style(dottedline,1) // threshold line // number of crossovers sine threhold bar if barindex > var then sum = summation[barindex-var](c) drawtext("#sum# crossovers in range",0,-30)anchor(top,xshift,yshift) Xover = summation[barindex-var](c) > 0 if Xover = 1 then drawtext("#Xover# YES! ",0,-60)anchor(top,xshift,yshift) else drawtext("#Xover# NO! ",0,-60)anchor(top,xshift,yshift) endif endif return sma5 coloured("red") as"sma5" ,sma10 coloured("lime") as"sma10",close style(dottedline,1)

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  defparam drawonlastbaronly = true   //constants daysBack = 1 // number of days back or maximum bars in chart!   // indicators sma5 = average[5,0](close) sma10 = average[10,0](close)   // crossover  condition c = sma5 crosses over sma10   //  offset to last crossover Clast = barssince(c,0)   // crossover bar Xbar = (barindex-Clast) //drawtext("#Xbar# crossovers",0,-60)anchor(top,xshift,yshift)     // threshold limit bar Lbar = barindex -  (barssince(day<>day[1],daysBack-1)-1) //drawtext("#Lbar# threshold limit bar",0,-60)anchor(top,xshift,yshift)       // drawing!   // if theres at least one crossover after threshold limit then display text if Xbar > Lbar and cLast > -1 then   // draw last crossover line drawVline(Xbar) coloured("red") style(dottedline,1) // crossover line   // draw text bi = barindex // as a user variable dif = Xbar-var  // difference between xover offset and threshold   drawtext("Threshold at bar #var# SMA5 last crossed over SMA10 at bar #Xbar# , #dif# bars from threshold ",0,40, dialog,standard,20)anchor(bottom,xshift,yshift) drawtext("Also, last crossed over is  #Clast# bars back from current bar #bi# ",0,20, dialog,standard,20)anchor(bottom,xshift,yshift) endif   // draw threshold limit line var = barindex - (barindex - Lbar) // threshold bar drawVline(var)   style(dottedline,1) // threshold line   // number of crossovers sine threhold bar if barindex > var then sum = summation[barindex-var](c) drawtext("#sum# crossovers in range",0,-30)anchor(top,xshift,yshift)   Xover = summation[barindex-var](c) > 0 if Xover = 1 then drawtext("#Xover# YES! ",0,-60)anchor(top,xshift,yshift) else drawtext("#Xover# NO! ",0,-60)anchor(top,xshift,yshift) endif endif       return sma5 coloured("red") as"sma5" ,sma10 coloured("lime") as"sma10",close style(dottedline,1)

   

   

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  druby

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  12/05/2024 at 10:56 AM #241136
  thomas2004ch

  Many thanks all!

  

  thomas2004ch

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  12/05/2024 at 2:50 PM #241150
  thomas2004ch

  Here i smy indicator:

  MyMA5 = Average[5](close)
  MyMA20 = Average[20](close)

  cond2 = MyMA5 crosses over MyMA20
  testCross = BarsSince(cond2, 1)

  return testCross

  The output looks like the saw signal. But what I want is like pulse as shown as in the attached picture. Is it possible?

  

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  12/05/2024 at 4:11 PM #241155
  druby

  It appears from image, that you want to highlight when crossovers occur.

  MyMA5 = Average[5](close) MyMA20 = Average[20](close) cond2 = 0 if MyMA5 crosses over MyMA20 then cond2 = 1 endif testCross = BarsSince(cond2, 1) return cond2 style(histogram,1)

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  MyMA5 = Average[5](close) MyMA20 = Average[20](close)   cond2 = 0 if MyMA5 crosses over MyMA20 then cond2 = 1 endif   testCross = BarsSince(cond2, 1)   return cond2 style(histogram,1)

   

   

  

  druby

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  12/05/2024 at 4:45 PM #241156
  thomas2004ch

  wonderful, many thanks!

  

  thomas2004ch

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  12/05/2024 at 9:43 PM #241162
  thomas2004ch

  @druby

  Hi, I thnik it is not correct since you used the cond2 but not the testCross.

   

  Surely it maybe because I used the ‘1’ in the BarsSince(). In this case the Barssince() has less meaning.  I should change it to any number greater than 1.

   

   

  

  thomas2004ch

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  12/05/2024 at 10:34 PM #241163
  druby

  Not sure where you going with this, with regards to original question.

  BarsSince(condition,0) with’0′ gets the bar offset to last condition that was true, from the current bar..

  Using ‘1’ gets the offset to the true condition prior to the last.

  The saw tooth action is plotting the current continuous offset value,  since it is plotted every bar from on return line.

  Additionally, the staggering level of the low of the saw tooth is because, when a new crossover happens,

  the one being plotted stops being the prior one and the prior last one becomes the current prior one, and so on after each new crossover.

  From your image I took it as you were highlighting the crossover points which is when you use ‘0’ in barsSince.

  Regardless, of what value you put in BarsSince, each crossover will be highlighted other than  crossovers below n down to ‘0’

  So the crossovers never change position with respects to the averages and the bars number there on, just the offset from the current barindex value.

  Why did you only highlight 3 crossovers in your image?

  

  druby

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  12/06/2024 at 9:43 AM #241174
  thomas2004ch

  Hi,

  my original question is: I wonder if there is a function which can tell me in the last or within the last n days an event or condition comes true.

  I use another chart software where there is a function called EXIST(event, days). I attach a screesnhot. Maybe  you can understand what I wat better?

  

  thomas2004ch

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  12/06/2024 at 12:33 PM #241183
  robertogozzi

  This will return the number of occurrences withim the last N bars:

  ONCE N = 5 MyMA5 = Average[5](close) MyMA20 = Average[20](close) return summation[N](MyMA5 crosses over MyMA20) style(histogram,1)

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  ONCE N = 5 MyMA5  = Average[5](close) MyMA20 = Average[20](close) return summation[N](MyMA5 crosses over MyMA20) style(histogram,1)

   

  

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  12/06/2024 at 1:06 PM #241190
  thomas2004ch

  HI @roberto,

  here i smy code:

  ONCE N = 3
  MyMA5 = Average[5](close)
  MyMA10 = Average[10](close)
  MyMA20 = Average[20](close)

  c1 = MyMA5 crosses over MyMA10
  c2 = MyMA5 crosses over MyMA20

  return summation[n](c1 and c2)

   

  Attached is the creenshot. One can see there is much less signals.

   

   

  

  thomas2004ch

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  12/06/2024 at 2:42 PM #241198
  LucasBest

  In your code, fast MA have to cross the 2 others at same barindex…

  Correction

  ONCE N = 3 MyMA5 = Average[5](close) MyMA10 = Average[10](close) MyMA20 = Average[20](close) A1 = summation[n](MyMA5 crosses over MyMA10)>0 A2 = summation[n](MyMA5 crosses over MyMA20)>0 R = A1 and A2 return R

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  ONCE N = 3     MyMA5 = Average[5](close)     MyMA10 = Average[10](close)     MyMA20 = Average[20](close)       A1 = summation[n](MyMA5 crosses over MyMA10)>0     A2 = summation[n](MyMA5 crosses over MyMA20)>0       R = A1 and A2       return R

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  LucasBest

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  12/06/2024 at 2:56 PM #241199
  thomas2004ch

  beautiful! Many thanks!

  

  thomas2004ch

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