Since this has been the fav question in the ES thread, I am reposting it here, courtesy of Volente (author) and Callmate (summary):
Q: What is the rule of 10 or T day theory?
"Summary of T day theory:
MWF short bias
T days long bias
Short the up spikes and gap ups on MWF.
Buy the gap down and down spikes on T days.
10:30 is a important time when trading
Rule of 10:
Rule of 10 says ES moves in 10 point intervals. If market is trending down and you want to fade the move, wait to go long when it drops 10 points fromt the previous low and if done properly you should be able to grab 8-10 ticks on the retracement.
If market is trending up wait for it to move 10 points over the previous high to short and then cover on the 3-4 point retracement."
In the attached chart you can see several examples of the Rule of 10 at work, including multiples, rule of 20...
(1377-87, 1396-76, 1376-86, 1384-94)
Q: What is the rule of 10 or T day theory?
"Summary of T day theory:
MWF short bias
T days long bias
Short the up spikes and gap ups on MWF.
Buy the gap down and down spikes on T days.
10:30 is a important time when trading
Rule of 10:
Rule of 10 says ES moves in 10 point intervals. If market is trending down and you want to fade the move, wait to go long when it drops 10 points fromt the previous low and if done properly you should be able to grab 8-10 ticks on the retracement.
If market is trending up wait for it to move 10 points over the previous high to short and then cover on the 3-4 point retracement."
In the attached chart you can see several examples of the Rule of 10 at work, including multiples, rule of 20...
(1377-87, 1396-76, 1376-86, 1384-94)