Even if the price is determined before the ICO sale sometimes the token can fall by a half after transformation into the coin. This can happen if the price of the token is stated t high. I had personally invested in cheaper tokens because I already had some fails with a big price tokens before. Try to evaluate your moves before investing blindly into the token that has the shady and unrealistic price.
That is all sensible advice really, but I was looking for a more systematic approach. I thank you for your tips in any case. The fact that not many people are responding to this tells me that lots of "stupid" money is flowing into meaningless companies.