Day traders are stock traders who hold positions for a very short time (from minutes to hours) and makes numerous trades each day. Most trades are entered and closed out within the same day. Traditionally it is suggested day traders should always settle their positions before the market close of the trading day to avoid the risk of price gaps (price differences between previous close and next day open that it looks like a "gap" between price activities) at the open. Some day traders consider this as a golden rule which have to stick with firmly and strictly all the time.