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Bollinger Band Mean Reversion Trading Strategy

Author: ChaoZhang, Date: 2023-12-27 17:18:26
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Overview

This is a mean reversion trading strategy based on Bollinger Bands. It combines mean reversion trading and risk management mechanisms to capture short-term reversal opportunities in trending markets.

Strategy Logic

The strategy uses 20-day Bollinger Bands to identify overextended price areas. It goes short when price nears the upper band and goes long when price nears the lower band, profiting from eventual reversals.

It also sets stop loss and take profit based on ATR. The stop loss is set at price breaking the moving average minus 2 times ATR. Take profit is set at price plus 3 times ATR. This effectively controls the risk per trade.

Specifically, the strategy includes:

  1. Calculate 20-day Bollinger Bands upper band, lower band and moving average
  2. Calculate 14-day ATR
  3. Long when price crosses above lower band; Short when price crosses below upper band
  4. Set stop loss at price minus 2 times ATR and take profit at price plus 3 times ATR when long
  5. Set stop loss at price plus 2 times ATR and take profit at price minus 3 times ATR when short

Advantage Analysis

The main advantages are:

  1. Bollinger Bands effectively identify overextended price areas
  2. Profit from reversals through mean reversion
  3. ATR stops set risk controls
  4. Positive backtest results with multiple profitable trades

Risk Analysis

Potential risks include:

  1. Failed reversal risk if price continues trending
  2. Stop loss skipped risk from price gaps
  3. Parameter optimization required for changing markets

Solutions:

  1. Strictly follow stop loss rules to limit loss per trade
  2. Optimize parameters to suit current markets
  3. Use options or other tools to hedge gap risk

Optimization Directions

The strategy can be further optimized by:

  1. Testing different moving averages for best parameters
  2. Adding filters to improve trend determination
  3. Adjusting ATR multiples to fine tune stops and limits
  4. Incorporating dynamic exit mechanisms based on market regimes

This will further enhance the stability and return profile.

Summary

In summary, the Bollinger Band mean reversion strategy with trend filters and risk management has demonstrated positive results. With continuous optimization and enhancements, it holds potential for steady and high-quality excess returns.

/*backtest
start: 2022-12-20 00:00:00
end: 2023-08-10 00:00:00
period: 1d
basePeriod: 1h
exchanges: [{"eid":"Futures_Binance","currency":"BTC_USDT"}]
*/

//@version=4
strategy("Mean Reversion with Risk Management", overlay=true)

// Inputs for Bollinger Bands and Risk Management
length = input(20, minval=1, title="Bollinger Bands Length")
mult = input(2.0, title="Bollinger Bands Multiplier")
stopLossATRMult = input(2.0, title="Stop Loss ATR Multiplier")
takeProfitATRMult = input(3.0, title="Take Profit ATR Multiplier")

// Bollinger Bands Calculation
src = close
basis = sma(src, length)
dev = mult * stdev(src, length)
upper = basis + dev
lower = basis - dev
plot(upper, "Upper Band", color=color.red)
plot(lower, "Lower Band", color=color.green)

// ATR for Stop Loss and Take Profit
atr = atr(14)

// Trading Conditions
longCondition = crossover(src, lower)
shortCondition = crossunder(src, upper)

// Order Execution with Stop Loss and Take Profit
if (longCondition)
    sl = src - stopLossATRMult * atr
    tp = src + takeProfitATRMult * atr
    strategy.entry("Long", strategy.long, stop=sl, limit=tp)

if (shortCondition)
    sl = src + stopLossATRMult * atr
    tp = src - takeProfitATRMult * atr
    strategy.entry("Short", strategy.short, stop=sl, limit=tp)
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