Earliest opening broker on sunday?

Bloomberg terminal starts its trading hour at 6:00 PM GMT on Sunday.

Do you know any broker that starts its trading hour close to this time?
(the earliest I have found was 8:00 PM GMT, my broker starts at 9:00PM GMT)

But it can be dangerous if the market is open for 2-3 hours and we cant trade.
For example check the gap in your EURUSD chart on the 7th may 2012. (The lower timeframe chart you check the better it is.)

That gap doesnt exist in Bloomberg charts! It exist only in our chart because the retail brokers opened 2-3 hours later

Of the brokers who open the earliest, I think Oanda's market open is the first (though that just means I haven't heard of another broker that's earlier as of yet.)

They open at 3pm NYC time (currently EDT.)

yes, 3:00 pm EDT = 8:00 pm GMT

It is a bit late because the market is open for hours at that time already.

another example: I saw a trade in EUR/CHF @ 1,2010 last sunday at 6 pm GMT on the bloomberg terminal. That is a huge gap.

Retail brokers started @ 1,2070 two-three hours later.