Define the area before price returns
Start with a cluster of meaningful turning points on one timeframe. Record the lowest and highest prices in that cluster, whether you used candle extremes or closing prices, and the dates involved. Avoid widening the area after each unfavorable move: a boundary that moves with the outcome cannot be tested fairly.
Repeated reactions make an area worth examining, but do not establish a permanent barrier. A previous resistance area may later act as support after price crosses it. That change of role remains a hypothesis until the subsequent reaction is visible.
A fictional support area from 49.60 to 50.40
Assume three completed daily candles formed lows at 49.60, 50.00 and 50.40 dollars, each followed by a rebound. The resulting zone is 0.80 dollars wide, or 1.6% of its 50-dollar midpoint. A later low of 49.90 with a close at 50.70 is compatible with another reaction inside that zone. A close at 49.20 is below its lower boundary and weakens the original interpretation.
A price area does not reveal resting orders
Historical candles do not prove that the same participants still want to transact there. News, gaps and changing volatility can overwhelm a familiar area. A very wide zone may describe almost any outcome while providing little useful discrimination. A very narrow zone may confuse ordinary variation with failure.
Test one clearly documented area
On an available completed daily, weekly or monthly chart, choose one area using only earlier candles. Write down the boundaries and your rule for failure before examining later prices. Then compare the subsequent close and the next reaction. Keep the observation separate from any trading decision; the chart alone does not specify position size or execution costs.
Primary sources
Sources explain the mechanics and limitations; the editorial examples use invented numbers rather than market quotations.
Your next practical step
Open a chart and compare a clearly defined zone with completed candles.
Open the first-chart instructions ↗