Gann numbers: W.D. Gann was a stock and a commodity trader working in the '50s, who reputedly made over $50 million in the markets.

An up gap is formed when the lowest price on a trading day is higher than the highest high of the previous day.

Any data in ISM (Institute for Supply Management) Manufacturing Index over 50 points shows the expansion of economic activities, and data under 50 points shows a contraction.