Use indicators as measurements, not magic signals

A moving average, range measure, oscillator, or channel is a calculation over data. It can describe trend, momentum, dispersion, or location, but the calculation itself does not explain why a trade should be profitable.

Start by deciding which market property you want to measure. Then ask whether that measurement is available without future information and whether it improves a decision beyond a simpler baseline.

Several indicators built from the same price series may provide less independent information than their names suggest. Adding correlated filters can reduce trade count and make a historical curve look tidier while adding little real evidence.

Compare an indicator rule with a simple reference strategy using the same costs and risk model. The question is whether the measurement improves expectancy, drawdown, timing, or operational clarity—not whether it creates a more attractive chart.

If a rule cannot survive small changes in its period or threshold, treat it as a research warning.