Chart Levels — Swing Support & Resistance

For each enabled timeframe, the loaded candles are aggregated to that timeframe and scanned for swing highs and lows -- a bar whose high (or low) beats every bar within a configurable number of bars on either side. The nearest swing above the last price draws as resistance, the nearest below as support, one or two levels per side. Every timeframe is its own independent switch, so any combination -- 1H with 1D, or 4H with 30m -- is available at once.