Trend indicators
Envelopes
Two lines a fixed percentage above and below a moving average, marking where prices are stretched.
La idea en pocas palabras
Prices tend to swing around their average and rarely stray very far from it. Envelopes draw a fence at a fixed distance, say 0.1% for a calm currency pair or 2–3% for a stock, so you can see when a move has gone unusually far.
Cómo se calcula
Take a moving average and add or subtract a fixed percentage of it.
Upper = MA × (1 + deviation ÷ 100)
Lower = MA × (1 − deviation ÷ 100)
Defaults: 14-period SMA, deviation 0.1%Cómo usarlo
- Set the percentage so that most candles stay inside the envelope on your timeframe.
- In ranges, touches of the bands can mark turning points.
- In trends, closes outside the band in the trend direction show strength.
Sacar conclusiones
- Unlike Bollinger Bands, envelopes do not widen in volatile times, so they are easier to read but adapt less.
Ejemplo
On EURUSD H1 with a 0.15% envelope, the price touches the lower band at 1.0790, about 16 pips below the average, and drifts back to the average over the next few hours.
Los precios de los ejemplos son ilustrativos.
Ten cuidado con
- The right percentage depends on the market and timeframe: adjust it rather than using the default everywhere.
Un poco de historia
Percentage bands around a moving average are one of the oldest band techniques, used long before volatility-based bands such as Bollinger's.
Solo contenido educativo. Ningún indicador ni patrón predice el futuro, y nada de lo aquí expuesto es asesoramiento de inversión.