Support is an area watched as a possible floor for price, and Resistance as a possible obstacle to a rise. This is an interpretation of a chart, not a fixed market boundary or a promise of order execution.
Fidelity explains Support through expected buying interest and Resistance through expected selling. These names describe a hypothesis about price reaction; a line alone does not measure current demand or supply. [1]
StockCharts uses previous reaction lows and highs. To reproduce the construction, state the market, Timeframe and specific points: choosing another slice of history can produce different areas. [2]
StockCharts allows price zones because a reaction need not occur at one exact price. Set the zone width before evaluating the next move; widening it afterward to fit the outcome changes the original rule. [2]
A break can change the assumption about support or resistance. An editorial implication of TradingView historical testing rules: define in advance whether a break means a price above the boundary during the candle, or only its Close above the boundary. These conditions need not produce the same result. [1] [3]
Fidelity describes a breached Resistance becoming Support and vice versa. On a particular chart this is a scenario to verify: price may never return, and the area may fail to hold if it does. [1]
StockCharts shows trading ranges between support and resistance as well as false breaks. Repeated reactions are historical observations, not by themselves a calculated probability of another bounce. [2]
TradingView distinguishes simulated fills, fees and slippage. The price of a drawn zone therefore does not guarantee a trade price. State entry and exit rules, costs and execution assumptions in a test. [3]
TradingView warns about lookahead bias and overfitting. Record when the zone could have been identified; do not use a later peak as a point known at the time. Also test rules on data not used to select them. [3]
One candle, two different conditions
For the clearest picture, read this entry together with Price action, Technical analysis, Timeframe, Breakout, False Breakout, Backtesting. The reverse links also lead from Trendline, Price Channel, Breakout, False Breakout.
01Do repeated bounces guarantee another bounce?+
No. They document reactions in past data. The probability of another reaction would require a precise event definition and statistical testing, not merely a count of lines or touches.
02Why do two analysts draw different zones?+
They may select different historical points, Timeframe, market or area width. Compare rules established in advance and when data became available; the same tool name does not imply the same construction.