You need to be more specific. GMT+1 is a time zone, not a time of day.
I assume you are saying that your broker is in the GMT+1 time zone. Are you also saying that your broker opens a new daily candle at midnight in the GMT+1 time zone?
GMT+1 is the current time zone in London, because the U.K. is now on Daylight Saving Time, and their time zone, BST (British Summer Time), is GMT+1.
GMT+1 is 5 hours ahead of New York. So, midnight GMT+1 (in London) = 7pm EDT (in New York). This is actually 2 hours after the 5pm close of the business day in New York, not 1 hour.
For most aspects of forex trading --- for instance, applying daily pivots --- the 2-hour difference between 5pm and 7pm is negligible.
A very successful trader on this forum, whose work I follow closely --- Michael Huddleston, a.k.a. InnerCircleTrader --- switches back and forth between midnight London and midnight New York in evaluating his daily pivots. I use 5pm New York, year-round, and never look at any other start-time for my pivots. Yet, Michael and I see very similar price action, and very similar trade set-ups.
With MT4, it's possible to adjust daily pivots to any start-time you prefer. In my opinion, if you are now using 7pm New York for your start-time, you're fine, and there's no need to adjust. Michael would probably suggest that you also watch midnight New York. Take your choice.
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