different instruments support different strategies. I use shares for long term holdings (I have a strategy to exit overvalued stocks and pick up more with the net proceeds on the pullback). I use CFD's for short term - i don't like SSF's because of stoploss issues, but you can equate the two. Warrants vs CFD's is a lengthy debate. Warrants have cheaper transaction costs, and are safer instruments, but you have to be very conscious of time decay, and you can't hold them for as long as a CFD. Installments are used by the guys who take 3-6 month views on stock prices. There are a number of guys in the forum with such strategies, check out Barry's posts and his website for more details.