iBarShift at no standard graph ...
Hi,
I have graph, when bars start no standard time, example: TF 15min: xx:05; xx:20; etc.
I wrote easy code script:
Why function iBarShift don´t return value "-1"? It return others value (16), see image. I have no bars at start time 9:00 ...?
Hi,
I have graph, when bars start no standard time, example: TF 15min: xx:05; xx:20; etc.
I wrote easy code script:
Why function iBarShift don´t return value "-1"? It return others value (16), see image. I have no bars at start time 9:00 ...?
| int iBarShift( | string symbol, int timeframe, datetime time, bool exact=false) |
| symbol | - | Symbol the data of which should be used to calculate indicator. NULL means the current symbol. |
| timeframe | - | Timeframe. It can be any of Timeframe enumeration values. 0 means the current chart timeframe. |
| time | - | value to find (bar's open time). |
| exact | - | Return mode when bar not found. false - iBarShift returns nearest. true - iBarShift returns -1. |
datetime time=StrToTime("2013.02.25 09:00"); int StartShift = iBarShift(NULL,0,time, true); Alert(StartShift);
Last parameter iBarShift true
The bar you found is timing 8:50 till 9:05
iBarShift does
Search for bar by open time option false return nearest
option true only barnumber if time for search is included in bar
AS you can see good reading gives you the answer and sometimes i have trouble with it
Maybe, I don´t understand english well...
last parameter (true) = I want bar with exactly open time (9:00) or return "-1"
When was last parameter false - I understand why mql return bar open time 8:50 (nearest bar)
Search for bar by open time. The function returns bar shift with the open time specified.
If the bar having the specified open time is missing, the function will return -1
or the nearest bar shift depending on the exact.
Your bar is not missing the specified open time so it is not returning -1
and if you choose exact as false it gives always the nearest barshift with your time chosen
with option true you get -1 if there is no bar on chart with specified open time included
//+------------------------------------------------------------------+ //| BarShiftTESTER.mq4 | //| Copyright 2013, deVries | //| | //+------------------------------------------------------------------+ #property copyright "Copyright 2013, MetaQuotes Software Corp." #property link "http://www.metaquotes.net" extern string testdate="2013.02.25 09:05"; //+------------------------------------------------------------------+ //| expert initialization function | //+------------------------------------------------------------------+ int init() { //---- //---- return(0); } //+------------------------------------------------------------------+ //| expert deinitialization function | //+------------------------------------------------------------------+ int deinit() { //---- Comment(""); //---- return(0); } //+------------------------------------------------------------------+ //| expert start function | //+------------------------------------------------------------------+ int start() { //---- datetime time=StrToTime(testdate); int StartShift1 = iBarShift(NULL,0,time, false); int StartShift2 = iBarShift(NULL,0,time, true); Comment("StartShift1 ",StartShift1," StartShift2 ",StartShift2); //---- return(0); } //+------------------------------------------------------------------+
Short program for testing to see what iBarShift is doing.....
You have a M15 bar at 8:50:00 through 9:04:59. That includes 09:00. The last parameter is thus irrelevant.
Had the bar not exist, then the last parameter would affect the return value. iBarShift(NULL,0, 0, false) == Bars - 1 while iBarShift(NULL,0, 0, true) = -1
So when the documentation says "Search for bar by open time. The function returns bar shift with the open time specified." it doesn't actually mean open time ?
If the attached EA is on a H1 chart there will be no bar with an open time of 9:05 so I would expect StartShift1 to give a valid bar number and StartShift2 to give -1
Maybe, I don´t understand english well...
last parameter (true) = I want bar with exactly open time (9:00) or return "-1"
When was last parameter false - I understand why mql return bar open time 8:50 (nearest bar)
your english is good
only how we understand what is written is sometimes different
if i have problems with a function and wants to know what it does
then the answer will be mostly given to me with a short testing program
So when the documentation says "Search for bar by open time. The function returns bar shift with the open time specified." it doesn't actually mean open time ?
If the attached EA is on a H1 chart there will be no bar with an open time of 9:05 so I would expect StartShift1 to give a valid bar number and StartShift2 to give -1
Yes we all learn answering questions Simon,
but testing time "2013.02.24 09:05" gives value for StartShift1 and returns -1 for StartShift2
Yes we all learn answering questions Simon,
but testing time "2013.02.24 09:05" gives value for StartShift1 and returns -1 for StartShift2
Not on my H1 chart it doesn't . . . I get a value of 7 for StartShift1 and StartShift2
you tested "2013.02.25 09:05" i assume
if you change date to 24 like "2013.02.24 09:05" you will get it
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Hi,
I have graph, when bars start no standard time, example: TF 15min: xx:05; xx:20; etc.
I wrote easy code script:
Why function iBarShift don´t return value "-1"? It return others value (16), see image. I have no bars at start time 9:00 ...?