timeOffset mistake

Gamestudio Links

Zorro Links

Newest Posts

optimize global parameters SOLVED
by dBc. 09/27/25 17:07

ZorroGPT
by TipmyPip. 09/27/25 10:05

Release 2.68 replacement of the .par format
by Martin_HH. 09/23/25 20:48

best practice for futures historical data file organization
by purpledawn. 09/23/25 01:38

Discrepancy between Zorro and Visual Studio results
by dBc. 09/21/25 13:11

assetHistory one candle shift
by jcl. 09/21/25 11:36

Plugins update
by Grant. 09/17/25 16:28

Are Kraken and Deribit perpetual futures supported?
by Niels. 09/17/25 15:50

AUM Magazine

Latest Screens

Who's Online Now

2 registered members (TipmyPip, AndrewAMD), 15,897 guests, and 5 spiders.

Key: Admin, Global Mod, Mod

Newest Members

krishna, DrissB, James168, Ed_Love, xtns
19168 Registered Users

Print Thread

Rate Thread

timeOffset mistake #488885 09/11/25 18:41 09/11/25 18:41
Joined: Jan 2022 Posts: 70 Budapest N NorbertSz OP Junior Member
NorbertSz OP Junior Member N Joined: Jan 2022 Posts: 70 Budapest	Hello, I am planning to use timeOffset, to determine the previous day's bar at a given time. Sample: Code ... int timezone = CET; if (lhour(timezone, 0) == 10 && minute(0) == 0){ int asd = timeOffset(timezone, 1, 5, 0); printf("current time: %d %d %d %d\n", month(0), day(0), lhour(timezone, 0), minute(0)); printf("offset time: %d %d %d %d\n", month(asd), day(asd), lhour(timezone, asd), minute(asd)); printf("-----------\n"); } Result: Code ... current time: 5 29 10 0 offset time: 5 28 5 0 ----------- current time: 5 30 10 0 offset time: 5 29 5 0 ----------- current time: 5 31 10 0 offset time: 5 30 5 0 ----------- current time: 6 3 10 0 offset time: 5 31 21 45 ... So usually it behaves as it expected: at 10 AM, with timeOffset I get the previous day's 5AM bar, which is correct. However at mondays, as you see in the last two lines: I checked at candle 2024-06-03 10:00 AM Expected result: 2024-05-31 05:00 AM Result I got: 2024-05-31 21:45 AM (If you want to double-check, please keep in mind that it's 2024 data. So in 2025, 06-03 is not monday, but in 2024 it is.) Do you have any idea why is this wrong? Is it a bug, or I am missing something? Last edited by NorbertSz; 09/11/25 19:31.

Re: timeOffset mistake [Re: NorbertSz] #488888 09/13/25 11:25 09/13/25 11:25
Joined: Jan 2022 Posts: 70 Budapest N NorbertSz OP Junior Member
NorbertSz OP Junior Member N Joined: Jan 2022 Posts: 70 Budapest	I made another tests to make it more clear, without the timezone mess. Code int asd = timeOffset(UTC, 1, 5, 0); printf("current time: %d %d %d %d\n\n", month(0), day(0), hour(0), minute(0)); printf("offset time: %d %d %d %d", month(asd), day(asd), hour(asd), minute(asd)); if (hour(asd) != 5) printf(" !!!!!"); printf("\n"); printf("-----------\n"); Please see the attached picture. At monday (red zone) I am checking the previous day's 5AM bar. Surprisingly there is a trading day between monday and friday: sunday evening (orange zone), just a few bars. (Of course it's not that big surprise, it's because of the timezone shift.) ...but there are no bars in sunday at 5 AM. ...so i get the bar at friday 19:45. Please help me understand the rules of the timeOffset behavior. Why I got that bar exactly? It's not even the last bar of friday. As I see I need to make a custom search cycle to find the previous trading day's 5AM bar. It's OK. But then why do we have the built-in timeOffset function, if we can't use on mondays? Or how should I use it correctly? Attached Files Last edited by NorbertSz; 09/14/25 11:53.

Re: timeOffset mistake [Re: NorbertSz] #488889
09/13/25 11:53 09/13/25 11:53

Joined: Jan 2022
Posts: 70
Budapest

NorbertSz

OP
Junior Member

NorbertSz

OP
Junior Member

Joined: Jan 2022
Posts: 70
Budapest

Solution for previous day's hour and minute bar:

Code

int getBarFromPreviousDay(int h, int m, int tz = UTC){
    const int currentDay = day(0);
    for (int i = 1; i <= LookBack; i++) {
        if (day(i) == currentDay) continue;
        if (lhour(tz, i) == h && minute(i) == m) return i;
    }
    printf("No bar found for previous day at %02d:%02d within LookBack period.\n", h, m);
    return -1;
}

Last edited by NorbertSz; 09/13/25 11:54.

Moderated by Petra