Strange Time Zone / Timeframe problem

[Learner Trader]

Hi
Something strange has occurred on my charts.
I have emailed the developer of the indicators and am awaiting reply but thought I should post here in the hope of some guidance and help.
I have 2 charts both with 30min candles. But suddenly one of them is now showing a different start and end time. So one chart shows 10 minutes to completion of the 30min candle and the other chart shows 25mins to completion and it looks different because of this.
What has happened here and how do I get it back to normal again?
Thanks

[Learner Trader]

I seem to have solved it.
Normally I load 10 days data for one particular chart and not the other.
Recently we had the Easter trading hours and that has somehow made one chart out of sync. I only loaded one day data and it has reset itself.
So if you find some of your charts out of sync after holiday trading hours now you know why.
Thanks