I am a total noob. Whats PM? Post Meridiem??? Prime Minister??? Sorry, I just couldnt resist... I totaly dont know what PM means.... Primary Measurement?
You can run IB's PM Demo to get a feel for their PM. The leverage is not very good but the margin req is more stable than TIMS. TOS won't have PM until July but from what they told me, their calculations will be very similar to TIMS. So you will get a lot of leverage but your margin req can move a lot every day.