Aurora97 is very right, although I disagree about the "sleeping without worries" part.
Feb 26, 2007.....the Shanghai Composite Index plunged 10% in a day, and the next day our own KLCI plunged more than 100 pts at the opening bell. You may be able to cushion the blow with that massive RM17,500 per contract, but you'll sure as hell won't be able to sleep soundly during such turbulent times, because you're staring at thousands in paper losses per contract. Buy more contracts and you'll either save yourself or dig a deeper hole. The only measure that can save you (not without some "injuries", of course) are stop-loss points.
How do I know this? Because I was there, holding not one but 5 contracts at the time. And WITHOUT the aforementioned stop-loss points. Painful doesn't even begin to describe it.
For all the beginners who wish to venture into FKLI trading, I have one advice to all of you. You have to make sure you damn well know what you're doing. This instrument, together with other derivatives such as warrants and options, not to mention Forex (even more so), are about as close to gambling as you can get. Leverage is a double-edged sword, sure you can earn a lot quickly if things go your way, but if they don't, tough luck. With these FKLI contracts, you are always fighting against time, and that time is 30 days or less if you buy the spot month contract. And as aurora97 put it, your biggest weapon is CAPITALISATION, and you'll need tonnes of it.
And a last tip: Never meet a margin call. You may have heard that saying before, but I have experienced the truth of it. Trust me, you don't want to go through that. The sayings are there for a reason.

I need to highlight further...
"the stop loss mechanism" may not even work at times because of sudden volatile price flactuations that may not trigger it. The drop in the price is so rapid that stop loss trigger forgone totally.
I heard about the theory part, the actual workings i don't really know.