
This is a trading strategy that uses Bollinger Bands. The strategy aims to identify opportunities when prices fluctuate violently using Bollinger Bands and make corresponding buy or sell decisions.
The strategy calculates the upper band, middle band and lower band of Bollinger Bands to determine if the current price is within the volatile range and hence make decisions on opening or closing positions. When the price approaches the upper band, it is regarded as the extreme point for longs and the strategy chooses to close long positions. When the price falls near the lower band, it is regarded as the extreme point for shorts and the strategy chooses to open long positions.
In addition, the strategy also introduces trend reversal factors. If there is a reversal signal, it will also trigger corresponding buy or sell decisions. Specifically, the logic of the strategy is as follows:
The above is the basic trading logic of this strategy. By utilizing the characteristics of Bollinger Bands and combining trend and reversal factors, the strategy attempts to catch reversal points when volatility increases.
Compared with ordinary moving average strategies, this strategy has the following advantages:
In general, this strategy combines Bollinger Bands and price bars relatively well. It trades at reasonable reversal points to ensure a certain level of profits while controlling risks.
However, there are still some risks with this strategy:
Accordingly, future optimizations can focus on:
In conclusion, this is a typical Bollinger Bands trading strategy template. It avoids excessive ineffective trades common for using Bollinger Bands alone by introducing trend reversal judgement to filter signals, which can theoretically lead to good strategy performance. But parameters and signal filtering still need further optimization and improvement for robustness and to reduce misjudgements.
/*backtest
start: 2023-12-18 00:00:00
end: 2024-01-17 00:00:00
period: 1h
basePeriod: 15m
exchanges: [{"eid":"Futures_Binance","currency":"BTC_USDT"}]
*/
//Noro
//2018
//@version=3
strategy("Noro's Bollinger Strategy v1.2", shorttitle = "Bollinger str 1.2", overlay = true )
//Settings
needlong = input(true, defval = true, title = "Long")
needshort = input(true, defval = true, title = "Short")
length = input(20, defval = 20, minval = 1, maxval = 1000, title = "Bollinger Length")
mult = input(2.0, defval = 2.0, minval = 0.001, maxval = 50, title = "Bollinger Mult")
source = input(ohlc4, defval = ohlc4, title = "Bollinger Source")
uset = input(true, defval = true, title = "Use trend entry")
usect = input(true, defval = true, title = "Use counter-trend entry")
fromyear = input(2018, defval = 2018, minval = 1900, maxval = 2100, title = "From Year")
toyear = input(2100, defval = 2100, minval = 1900, maxval = 2100, title = "To Year")
frommonth = input(01, defval = 01, minval = 01, maxval = 12, title = "From Month")
tomonth = input(12, defval = 12, minval = 01, maxval = 12, title = "To Month")
fromday = input(01, defval = 01, minval = 01, maxval = 31, title = "From day")
today = input(31, defval = 31, minval = 01, maxval = 31, title = "To day")
showbands = input(true, defval = true, title = "Show Bollinger Bands")
//Bollinger Bands
basis = sma(source, length)
dev = mult * stdev(source, length)
upper = basis + dev
lower = basis - dev
//Lines
col = showbands ? black : na
plot(upper, linewidth = 1, color = col)
plot(basis, linewidth = 1, color = col)
plot(lower, linewidth = 1, color = col)
//Body
body = abs(close - open)
abody = ema(body, 30)
//Signals
bar = close > open ? 1 : close < open ? -1 : 0
up1 = bar == -1 and close >= basis and close < upper and (close < strategy.position_avg_price or strategy.position_size == 0) and uset
dn1 = bar == 1 and close <= basis and close > lower and (close > strategy.position_avg_price or strategy.position_size == 0) and uset
up2 = close <= lower and usect
dn2 = close >= upper and usect
exit = (strategy.position_size > 0 and close > open) or (strategy.position_size < 0 and close < open) and body > abody / 2
//Trading
if up1 or up2
strategy.entry("Long", strategy.long, needlong == false ? 0 : na)
if dn1 or dn2
strategy.entry("Short", strategy.short, needshort == false ? 0 : na)
if exit
strategy.close_all()