Mates

good day,can anyone help me mentioning which is the best cryptocurrency exchange site to buy newly released ICO(Initial Coin Offering) so that I can buy them ASAP,It is matter of sorrow to miss pre-sale ico of promising one,so I wanna buy them even when they are in exchange site

I would buy directly it from the ICO if you're that interested in it, instead of waiting for it to be listed on an exchange, and potentially costing you a lot of extra $. I don't really get your question..
If the ICO is already sold out, look up the coin/token on CMC or on their project site, and you should be able to find out on which exchanges they are listed rather easily.