Fixing the value of the close of the current bar across subsequent bars

• 06/01/2016 at 10:44 AM #8569
  merc1203

  I am not an experienced programmer – and indeed have difficulty in defining the problem, but this is what I

  am currently having problems with:

  I am trying to define a reference price level (RPL), and different things happen above and below this price point

  Let us assume the RPL is the close of the current bar

  This RPL is valid for all future bars UNTIL certain conditions are satisfied, at which point it shifts up or down

   

  My difficulty is that because it references “close”, whose value can change every bar going forward, how do

  I fix it at the closing price of that particular bar, and ensure that it doesn’t change in every subsequent bar to the

  closing price of the subsequent bar? I’m sure this is trivial but I’m far below trivial!

   

  I would appreciate any help whatsoever

  

  merc1203

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  06/01/2016 at 11:17 AM #8570
  Nicolas

  Hello merc1203,

  I don’t know what your code is all about, but this kind of conditional statement would solve your problem:

  if certainconditions=1 then RPL = close else RPL = RPL[1] endif

  1 2 3 4 5

  if certainconditions=1 then RPL = close else RPL = RPL[1] endif

  With this, if “certain conditions” are not met, your RPL value still have the same value than the previous bar.

   

  

  Nicolas

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  06/01/2016 at 12:25 PM #8574
  merc1203

  Very good Matthew – thanks for your help and prompness …

  

  merc1203

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  06/01/2016 at 1:16 PM #8581
  merc1203

  I have just tried to ProBacktest a simple model but I get an error message …

  Syntax error. line 46 character 1

  However, Line 46 is empty, Line 45 is …

  set target Pprofit profitEntry

  Is there a protocol for ending a piece of code?

   

  Many thanks

  

  merc1203

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  06/01/2016 at 3:03 PM #8590
  Nicolas

  Without the whole code is quiet difficult to know what cause your syntax error 🙂

  But it feels like you have forget an “ENDIF” somewhere maybe?

  

  Nicolas

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  06/02/2016 at 8:07 AM #8626
  merc1203

  Good morning,

  The code below doesn’t seem to be doing what I want it to do

  The idea is that if the current bar closes ABOVE the lowest of the last 3 bars’ highs AND WE ARE CURRENTLY IN SELL MODE then reset RPL to equal the closing price and switch to BUY MODE.

  As soon as the current bar closes BELOW the highest of the last 3 bars’ lows AND WE ARE CURRENTLY IN BUY MODE then reset RPL to equal the closing price and switch to SELL MODE

  Don’t quite know what the code is doing but it ain’t doing that!

  Any help would be very much appreciated – many thanks in anticipation

   

  once BMode = 0 once SMode = 0 once Mode = 0 nbH = lowest[3](high) nbL = highest[3](low) CondB = (close > nbH) CondS = (close < nbL) if CondB and Mode <> BMode then RPL = close and Mode = BMode if CondS and Mode <> SMode then RPL = close and Mode = SMode else RPL = RPL[1] Mode = Mode[1] endif endif

  1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

  once BMode = 0 once SMode = 0 once Mode = 0   nbH = lowest[3](high) nbL = highest[3](low)   CondB = (close > nbH) CondS = (close < nbL) if CondB and Mode <> BMode then RPL = close and Mode = BMode if CondS and Mode <> SMode then RPL = close and Mode = SMode else RPL = RPL[1] Mode = Mode[1] endif endif

   

  

  merc1203

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  06/02/2016 at 10:27 AM #8629
  Nicolas

  You were almost right.

  With this kind of statement:

  RPL <span class="token operator">=</span> <span class="token keyword">close</span> <span class="token keyword">and</span> Mode <span class="token operator">=</span> BMode

  1	RPL <span class="token operator">=</span> <span class="token keyword">close</span> <span class="token keyword">and</span> Mode <span class="token operator">=</span> BMode

  can’t return anything since you are making a conditional instruction that never match something.

  I think this code would make what you want to do here:

   

  once BMode = 0 once SMode = 0 once Mode = 0 nbH = lowest[3](high) nbL = highest[3](low) CondB = (close > nbH) CondS = (close < nbL) if CondB and Mode <> BMode then RPL = close Mode = BMode elsif CondS and Mode <> SMode then RPL = close Mode = SMode else RPL = RPL[1] Mode = Mode[1] endif

  1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

  once BMode = 0 once SMode = 0 once Mode = 0   nbH = lowest[3](high) nbL = highest[3](low)   CondB = (close > nbH) CondS = (close < nbL)   if CondB and Mode <> BMode then RPL = close Mode = BMode elsif CondS and Mode <> SMode then RPL = close Mode = SMode else RPL = RPL[1] Mode = Mode[1] endif

   

  

  Nicolas

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  06/02/2016 at 1:02 PM #8639
  merc1203

  Could someone please put me out of my misery – the code below FAILS TO TRADE AT ALL!

  I have tried substituting each individual part to try to isolate the issue but to no avail …

  The “buy side” works fine

  Many thanks in anticipation …

   

  riskEntry = 40.0
  profitEntry = 100.0
  tick = 2
  Scale = 10.0
  NofT = 5

  once BMode = 0
  once SMode = 0
  once Mode = 0

  nbH = lowest[30](high)
  nbL = highest[30](low)

  CondB = (close > nbH)
  CondS = (close < nbL)
  if CondS and Mode <> SMode then
  RPL = close
  Mode = SMode
  elsif CondB and Mode <> BMode then
  RPL = close
  Mode = BMode
  else
  RPL = RPL[1]
  Mode = Mode[1]
  endif
  CondDD = close[1]<open[1] and close[0]<open[0] and close[1]<RPL and close[0]<RPL

  CondNofT = abs(countofposition) < NofT

  CondScale = abs(close – TradePrice(1)) > Scale
  if close<RPL and CondDD and CondNofT and CondScale THEN
  SellShort 1.25 PerPoint at close – tick stop
  endif

  set stop Ploss riskEntry
  set target Pprofit profitEntry

  

  merc1203

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