Technical conditions refer to the conditions that usually affect the supply and demand, such as short interests, floating supply, and stop loss orders.
It is sometimes said that supply and demand must be equal or else there could not be any sales, but that is not so. There are always some people who are willing to sell at some price above the market who will not sell at the market; and when the demand for stock is greater than the supply, it goes up until it is supplied by some of these people who are holding it at a higher price.