RE:RE:Slight RaiseT is the date of the trade.
The numbers are the days allowed to settle the trade.
If you bought a stock on Monday then:
T1 means you must have the money to pay for it by end of day Tuesday.
T2 by end of day Wednesday.
T3 by end of day Thursday.
Canada and the U.S. are now T1. Europe is stil T3. I'm not sure about the U.K. or markets in Asia.
Does this help?