The time at which an indicator recalculates

The ticks only come in when the system tells them to, there is no set amount of ticks per minute.  Because of the way the specific markets work (London, New York, etc.), you might not get as many ticks some times of the day compared to others when the markets are really busy.  That will affect the data within the minute bar depending on if there is enough variation among the values of the ticks received within that minute.  The minute bar (or candle or whatever indicator style you use) is basically all of the ticks received within that minute added together.  In theory, if there is not enough sales, you could have no change at all for multiple minutes.  If your indicator is reading the information directly from the ticks, then like the minute bar, your indicator might not change information shown until it receives a change.

I am not sure I would consider this consequences.  Did you try testing it when the market is more active?

Hi JD4 - thanks for the reponse.

I understand - I think.

The situation occurred at the end of the trading week and in demo mode - but I took a trade and almost immediately closed (because 2 indicators had the same value - to 5 decimal places at least).

The indicators I used also appeared to cross at this point in time

I already had code to ensure a further trade would not be considered until the next minute when the indicators should have been updated. 

In this case the figures were the same and hence I took the same trade and closed it. 

It was the unusual nature of this trade that drew my attention to the events.

Thanks again

Not sure what your complaint is above, you speak about some indicator variable, but it looks more like you speak about the tick price.

A tick is generated at server whenever the price changes, and the price has two values to watch - ask & bid. All charts are constructed with bid (though there are some unintended exceptions), but the tick also comes when ask changes alone. No idea what price your indicators work with.

Not sure I understand the point of your comment.

By means of explanation:-

A set of circumstances occurred which lead to an unexpected (to me) result.

JD4 made an explanation

I responded with thanks and took the time to explain in a little more detail about the set of circumstances I had encountered.

I have not COMPLAINED as you suggest - about anything

Doesn't really matter what the indicator does but I access the information using  the following code. 

The '1' represents a 1 minute chart

I had expected this code to produce new data (unless it had not changed) on the first tick in the the next minute but it didn't and the variable updated in what was in fact the third tick . 

Normally every tick within the same minute would generate the same response from the iCustom statement

Details are in my original post

EMA01_0_005      = iCustom( My_OrderSymbol, 1 , "ABC", 5, 0,  0);

1. You must have a complaint or a problem or you wouldn't have posted.
2. Don't hard code numbers; if you mean the minute chart say that: PERIOD_M1
3. Only new value if you called it in OnTick.

4. EMA01_0_005      = iCustom( My_OrderSymbol, 1 , "ABC", 5, 0,  0);

   You are asking for bar zero value. The Close[0] changes every tick, so any indicator can change value every tick.