An indication that there is a higher probability of one outcome happening over another. An edge is not a guarantee of success on any single trade but rather a statistical advantage that, when applied over a series of trades, leads to consistent results (15, 132). Douglas suggests building an edge using a combination of variables, such as deciding the profit margin at which you will exit a trade and the time frame you will assign different kinds of trades.

A fundamental analysis is the method that examines a company’s financial statements, debt to equity ratio, profit margin, and similar measures to determine the intrinsic value of its related security or stock. Although an important component of market analysis, fundamental analysis tends to focus on past data, sometimes ignoring short-term market trends and the psyche of the traders who make the market. Douglas suggests balancing the fundamental approach with technical and mental analyses.

A set of core beliefs necessary for developing a probabilistic mindset in trading. They are: 1) Anything can happen; 2) You don’t need to know what will happen next to make money; 3) There is a random distribution between wins and losses for any given edge; 4) An edge is simply a higher probability of one thing happening over another; and 5) Every moment in the market is unique.

The core fears that stem from a trader’s attitudes and are the source of most trading errors. These are the fears of being wrong, losing money, missing out on an opportunity, and leaving money on the table. The key to countering trading fears is to realize that they are the result of the psyche’s response to emotional pain, but the market itself is a neutral entity. To operate efficiently in the market, the trader must act counter to intuition and stop operating out of the mind’s natural fear-response.

The first of three developmental stages for a trader, designed to build self-trust and confidence by flawlessly executing a rigid trading system. In this stage, the trader learns to think in probabilities and create consistency by trading a specific edge over a sample size of at least 20 trades.

The approach to trading that focuses on the trader’s own psychology—attitudes, beliefs, and state of mind—as the primary determinant of success. It is presented as the important step beyond fundamental and technical analysis for achieving consistent profitability.

A mental state where a trader is completely focused on the present market action, free from the influence of past results or fear of future outcomes. By being in this state, the trader can perceive and act on what the market is offering from an objective perspective (88, 130).

The difference between a trader’s intellectual understanding of the markets and their actual ability to execute trades and generate consistent profits. This gap exists because knowing what to do is different from having the psychological mindset required to do it without fear or hesitation.

The core belief that all of one’s trading outcomes are self-generated, resulting from one’s own interpretations, decisions, and actions. It means accepting that the market is neutral and does not cause one’s wins or losses, which is the cornerstone of a winning attitude (33, 42).

A technical analysis is a method of market analysis that involves studying past data to make forecasts about the market. Technical analysis uses the chart of a stock’s movement to predict the best time for entering and exiting a trade.

The core mindset of a successful trader, which involves accepting that the outcome of any single trade is uncertain while believing that one’s edge will lead to consistent results over a series of trades. This approach is similar to how a casino operates, focusing on macro-level consistency rather than micro-level unpredictability.

A unique set of attitudes that enables a trader to operate effectively in the face of constant uncertainty. This mindset allows one to remain disciplined, focused, and confident, thereby overcoming the common fears and errors that plague most traders (7, 34).