Technical analysis
Description versus hypothesis
Chart structure and indicators can summarise what happened or define a prospective decision. Those functions are different. Historical direction, volatility and relative location can be measured without claiming a forecast. A familiar pattern supplies no universal success probability; predictive value belongs to the complete stated rule and relevant data.
Data and availability
Specify instrument, price side, timezone, intervals, missing observations and any volume source. A confirmed swing may require later candles, and a synthetic chart can display non-executable prices. Indicators transform existing observations rather than independently reveal every relevant market fact. Match each input to when it was actually available.
Evaluation and useful limits
Test unsuccessful signals as well as attractive examples, include realistic costs, and validate beyond the development sample. Selecting among many indicators or parameters can overfit history. Fundamental or event information can complement a rule but is another condition to evaluate. Technical analysis is an approach, not a guarantee that price history contains sufficient information for profit or that any one charting style is universally superior.