How to execute ea's with every new opening price, NOT with every tick?

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So I'm on the 'Program in mql4' section of the book. So far, I've only heard that ea's are called or executed every tick. By definition, a tick is a tiny change in price. I don't want such frequent execution; I want the ea to be called only once there's a new candlestick, when there's a new opening price. Is this possible, something I can know I can do going forward? 

I've programmed with Processing for over a year, fyi.  

 
r1001101: So I'm on the 'Program in mql4' section of the book. So far, I've only heard that ea's are called or executed every tick. By definition, a tick is a tiny change in price. I don't want such frequent execution; I want the ea to be called only once there's a new candlestick,
  1. Then why did you post in the MQL5/General section instead of the MQL4 section?
  2. If you had used this you would have found numerous posts.
    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 forum.) Always use time. New candle - MQL4 forum
    I disagree with making a new bar function, because it can only be called once per tick. A variable can be tested multiple times.
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