A climax is a term used when a stock has previously has gone up by 100% and then gaps up to gain 50%-100%. A gap up is when the stock on day X gaps to a higher price before day Y starts. This is the sign to get out of the stock. Remember, this is only when the stock has already shot way up. It will usually be within one week. It shows that the stock has come to the end and is sqeezing the life out of itself.