Daylight Saving Coding… AGAIN!

• 03/26/2024 at 12:24 PM #230465
  Brad

  Hi All

   

  I know this topic has been covered numerous times over the years:

  • PRT Strategy adjust Local TradeTime when Daylight Savings time changes +/- 1hr? : Forum ProBuilder support – ProRealTime (prorealcode.com)
  • Daylight savings time messing up charts : Forum ProRealTime platform support – ProRealTime (prorealcode.com)
  • Programmed Daylight Savings Time Change Code Block : Forum ProOrder support – ProRealTime (prorealcode.com)
  • Daylight savings : Forum ProRealTime platform support – ProRealTime (prorealcode.com)
  • Daylight savings code : Forum ProOrder support – ProRealTime (prorealcode.com)
  • Daylight Saving Time at Open Range Breakout? : Forum ProOrder support – ProRealTime (prorealcode.com)
  • Daylight savings anomaly inconsistency : Forum ProOrder support – ProRealTime (prorealcode.com)

   

  Yet, I am still struggling.

  This is the info I have:

  1. My charts are set to (UTZ+00:00)Z
  2. Market: Wall Street Cash (£1)
  3. During DST on a Friday, the market closes at 21hoo (UTZ)
  4. During Non-DST on a Friday, markets close at 22h00 (UTZ)

   

  As far as I can see, my indicator says:

  • No trades are to be opened from 19h00 on Fridays, and no trades are to be placed on Sundays during DST.
  • No trades are to be opened from 20h00 on Fridays, and no trades are to be placed on Sundays during Non-DST.

  TradingDay (with/without DST)

  // Determine the day of the week for the second Sunday in March MarchSecondSunday = (Month = 3) AND (DayOfWeek = 0) AND (Date >= 8) AND (Date <= 14) // Determine the day of the week for the first Sunday in November NovemberFirstSunday = (Month = 11) AND (DayOfWeek = 0) AND (Date >= 1) AND (Date <= 7) // Check if current date is within DST period IF Date > MarchSecondSunday AND Date < NovemberFirstSunday THEN DSTOn = 1 ELSE DSTOn = 0 ENDIF // Define trading hours based on DST status: IF (DayOfWeek = 5 AND Time >= 200000) OR (DSTOn AND Time >= 190000) OR (DayOfWeek = 0) THEN TradingDay = 0 ELSE TradingDay = 1 ENDIF Return TradingDay

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

  // Determine the day of the week for the second Sunday in March MarchSecondSunday = (Month = 3) AND (DayOfWeek = 0) AND (Date >= 8) AND (Date <= 14)   // Determine the day of the week for the first Sunday in November NovemberFirstSunday = (Month = 11) AND (DayOfWeek = 0) AND (Date >= 1) AND (Date <= 7)   // Check if current date is within DST period IF Date > MarchSecondSunday AND Date < NovemberFirstSunday THEN DSTOn = 1 ELSE DSTOn = 0 ENDIF   // Define trading hours based on DST status: IF (DayOfWeek = 5 AND Time >= 200000) OR (DSTOn AND Time >= 190000) OR (DayOfWeek = 0) THEN TradingDay = 0 ELSE TradingDay = 1 ENDIF Return TradingDay

  Yet, when I apply my indicator, it still shows:

  • Trading is allowed at 19h20 on Fridays and 23h40 on Sundays during DST.
  • Trading is allowed at 19h20 on Fridays and 23h40 on Sundays during Non-DST.
  • (Screenshots attached)

   

  A few questions, please:

  • Is my indicator coded correctly?
  • Does changing my chart time zone to: “Use different time zones for different markets (United States Indices – US)”  make coding for DST unnecessary? (This has been mentioned by members in the forum)
  • When completing a backtest, is a DST taken into account?

   

  Regards

  Brad

   

   

  

  Brad

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  03/26/2024 at 2:19 PM #230490
  robertogozzi

  Try this one:

  IF BarIndex = 0 THEN IF OpenMonth < 3 OR OpenMonth > 10 THEN DSTon = 0 ELSE DSTon = 1 ENDIF Sundays = 0 ENDIF // Determine the day of the week for the second Sunday in March when DST turns ON IF (OpenMonth = 3) AND (DSTon = 0) THEN IF OpenDayOfWeek >= 0 AND (OpenDayOfWeek[1] > OpenDayOfWeek) THEN Sundays = Sundays + 1 IF Sundays = 2 THEN DSTOn = 1 Sundays = 0 ENDIF ENDIF ENDIF // Determine the day of the week for the first Sunday in November when DST turns OFF IF (OpenMonth = 11) AND (DSTon = 1) THEN IF OpenDayOfWeek >= 0 AND (OpenDayOfWeek[1] > OpenDayOfWeek) THEN DSTOn = 0 ENDIF ENDIF // Define trading hours based on DST status: IF (OpenDayOfWeek = 5 AND ((OpenTime >= 200000 AND Not DSTon) OR (DSTOn AND OpenTime >= 190000))) OR (OpenDayOfWeek = 0) THEN TradingDay = 0 ELSE TradingDay = 1 ENDIF Return TradingDay

  1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34

  IF BarIndex = 0 THEN IF OpenMonth < 3 OR OpenMonth > 10 THEN DSTon = 0 ELSE DSTon = 1 ENDIF Sundays = 0 ENDIF   // Determine the day of the week for the second Sunday in March when DST turns ON IF (OpenMonth = 3) AND (DSTon = 0) THEN IF OpenDayOfWeek >= 0 AND (OpenDayOfWeek[1] > OpenDayOfWeek) THEN Sundays = Sundays + 1 IF Sundays = 2 THEN DSTOn   = 1 Sundays = 0 ENDIF ENDIF ENDIF   // Determine the day of the week for the first Sunday in November when DST turns OFF IF (OpenMonth = 11) AND (DSTon = 1) THEN IF OpenDayOfWeek >= 0 AND (OpenDayOfWeek[1] > OpenDayOfWeek) THEN DSTOn   = 0 ENDIF ENDIF   // Define trading hours based on DST status: IF (OpenDayOfWeek = 5 AND ((OpenTime >= 200000 AND Not DSTon) OR (DSTOn AND OpenTime >= 190000))) OR (OpenDayOfWeek = 0) THEN TradingDay = 0 ELSE TradingDay = 1 ENDIF Return TradingDay

   

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  Brad

  

  robertogozzi

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  03/26/2024 at 3:44 PM #230504
  PeterSt

  Hi Brad,

   

  Brad wrote:

  Does changing my chart time zone to: “Use different time zones for different markets (United States Indices – US)”  make coding for DST unnecessary? (This has been mentioned by members in the forum)

  Nope.

   

  Brad wrote:

  When completing a backtest, is a DST taken into account?

  If all the DLS periods are recognized in your code, Yes. Thus, backtest from of e.g. Jan 2019, and including the current one, 11 periods should be recognized and you must of course have those periods correct. You should also cover for the future, like the next period in autumn 2024 and spring 2025, assumed your Live System will be running until then.
  There is no automation for this, apart from your own. 🙂

   

   

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  Brad

  

  PeterSt

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  03/26/2024 at 3:50 PM #230505
  Brad

  Geez, I’ve got a lot to learn!

   

  Thanks very much, Roberto.

  

  Brad

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  03/26/2024 at 3:53 PM #230506
  Brad

  Thanks, Peter.

  That clears things up. 👍

  

  Brad

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  03/26/2024 at 3:57 PM #230507
  PeterSt

  robertogozzi wrote:

  Try this one:

  Roberto, your code does virtually nothing, because it is not (or will not be) about Daylight Savings as such, sec;
  You would not care a hoot whether your Italian stocks etc. open one hour earlier or later in relation to sun dawn when summer time has arrived next week (don’t even try to reason about the earlier or later if you want to survive this day 😉 ). What is important is the relation to the world markets. Thus, the past two weeks and the current week, the US markets open and close 1 hour earlier than Europe’s, because THEIR DLS already started two weeks ago; ours is just to come.
  In principle the same thing will happen in autumn (the US will be early) but whether the period takes 3 weeks again, is to be seen (I did not look it up yet).

  All we can say is that for Europe the rules are quite decent (your code contains that) and that for the US they seem to do what they like, or I don’t know the rules (why this idea ? because it is different often, like 1 week of difference, 2 weeks of difference, or 3 weeks of difference like currently). But hey, if you travel 10 States, you must change your watch 10 times. 🙂

  

  PeterSt

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  03/27/2024 at 2:03 PM #230578
  robertogozzi

  PeterSt wrote:

  if you travel 10 States, you must change your watch 10 times

  If you use different instruments of 10 different countries you will have to change the dates above 10 times.

  I just coded what had been asked.

   

   

   

  

  robertogozzi

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