Ok, Thanks Bruce

One other question, if bars are indicated by the time that they end, for instance a bar labeled 5 pm is for the time frame 4:45 to 5pm... then, what about the first bar of the week in fx that occurs on Sunday? 

There is a 5pm bar on sunday to start the weeks trading.   and trading begins at 5 pm..  so what is the 5pm bar?

Just to refresh, I was looking at the data of a 15 min chart of AUD/CAD.  I was confused by the last bar of each day and the last bar of each week. You answered that.  So if a bar time is actually the end of the data period, then the starting bar on sunday is confusing as trading begins at 5 pm and the first bar is listed as 5pm?

Thanks Bruce

when i export a 15 minute chart, aud/cad...fx chart, i look at the data and see a one minute bar at the end of each mid week day at 23:59 and at the end of the week, the last trading bar shows a time of 5pm and the first trading bar on sunday shows 5 pm.

My first question is...why the one minute bar at the end of the day?

My second question is....if trading ends at 5pm on Friday, the last bar should be 4:45 which would cover the time period from 4:45 to 5pm....what time period does the last bar on friday cover?  the one that starts at 5pm?

Why do indices show the previous day's closing price as the opeing price?  For example S&P500 Index.

This is not a true reflection of activity during the day.  It ignores the gaps that have been occuring in recent years.  On the chart, with an closing price say of 1378 for the S&P500 Index, that will also be the opening price the next day even though the index was never valued there.  The next day, the index value opened at 1371.

I realize that a true index calculation can not take place until all the stocks are opened but and some stocks do not always open or start trading on time due to imbalances or other reasons, but, the actual gap open for the index should be shown.

Many people do not actually realize that the index never traded that high, it becomes a misrepresentation of market activity because the high and open, or the low and open, can be mis-stated, and when we download your data, we back test ideas based on your data, we esentially are getting information that does not really represent the true market activity.

can you do anything to stop publishing the previous days close as the open.  Because this is not correct and truely is a misrepresentation of the actual market activity that occured.