ATR Dynamic Support and Resistance Bands - indicateur pour MetaTrader 5

ATR Dynamic Support and Resistance Bands

The idea behind it

Fixed price levels do not adapt to the market: a 50-pip move means a lot on a quiet day and very little on a volatile one. This indicator solves that by measuring the distance from a central moving average in units of ATR, the average true range of recent bars.

The upper band is basis + multiplier x ATR and the lower band is basis - multiplier x ATR. Price tends to react near these bands, so they work as dynamic resistance and support that automatically adjust to current volatility.

The ATR is calculated inside the indicator with Wilder smoothing, so no indicator handles are needed. On each new tick only the last bar is recalculated, and the full history is processed only once at start.

How to interpret it

• Upper band (dashed line) - dynamic resistance. Price reaching it in a range can signal an overextended move; a close beyond it with expanding bands can signal a breakout.
• Lower band (dashed line) - dynamic support, interpreted in the same way for downward moves.
• Basis line (dotted line) - the moving average (SMA or EMA) that the bands are built around. It acts as the "mean" price and as dynamic support or resistance inside a trend.
• Distance between the bands - a direct view of volatility. Narrowing bands show a quiet market and often precede a volatility expansion; widening bands show increasing volatility.
• Info label (top-left corner) - the ATR settings and the current ATR value in price units, useful for sizing stop-losses and targets.

Bands are context, not signals on their own. In a strong trend price can walk along a band for a long time, so confirm with price action or other tools.

External variables (inputs)

Recommended use

• Works on any symbol and timeframe. Start with the defaults (SMA 20, ATR 14, multiplier 2.0) on M15 to H4 charts.
• A smaller multiplier (1.0-1.5) gives tighter bands for scalping and short-term targets; a larger one (2.5-3.0) highlights only extreme moves.
• The EMA basis reacts faster to price changes, the SMA is smoother. Choose according to your style.
• The values of closed bars do not change (no repainting). The last bar is recalculated while it is forming, as with any moving average or ATR.
• The ATR is a lagging measure, so after a sudden news spike the bands adapt only over the next bars.
• The indicator needs at least a few more bars than the larger of the two periods to start drawing.
• It is a chart indicator only and does not trade, so it works the same on netting and hedging accounts.

Fig. 1. AtrBands on an H1 chart with default settings (black and white image per Code Base guidelines).