Draw Object for every new bar

[A A Adhioermawan]

Hello all, I want to draw trendline as forecast line so I want the line start from price Close[0]. The problem is, I want to draw the object automatically everytime new bar appear, any idea so I can update my object everytime new bar appear?

[William Roeder]

1. Don't double post! You already had this thread open.
             General rules and best pratices of the Forum. - General - MQL5 programming forum #6 (2017)

2. A A Adhioermawan: any idea so I can update my object everytime new bar appear?

   Detect a new bar, update your object.
   

   You can't know when a candle closes. Only when a new tick arrives that starts a new bar is the old bar closed, and that tick could arrive almost at the end of a bar's duration.

   For a new bar test, Bars is unreliable (a refresh/reconnect can change number of bars on chart), volume is unreliable (miss ticks), Price is unreliable (duplicate prices and The == operand. - MQL4 programming forum.) Always use time.
             MT4: New candle - MQL4 programming forum #3 (2014)
             MT5: Accessing variables - MQL4 programming forum #3 (2022)

   I disagree with making a new bar function, because it can only be called once per tick (second call returns false). A variable can be tested multiple times.
             Running EA once at the start of each bar - MQL4 programming forum (2011)

   
   

[Sergey Golubev]

Forum on trading, automated trading systems and testing trading strategies

...

Fabio Cavalloni, 2024.03.05 06:20

Close[0] changes until the bar is not finished. You should use Close[1] or Open[0]

The simpler way to detect a new bar into indicators is with condition

prev_calculated>0 && rates_total!=prev_calculated

[Sergey Golubev]

William Roeder #:
Don't double post! You already had this thread open.

I deleted that thread (thanks for informing).