This strategy is named “Price Extreme Reversion Strategy Based on Binomial Distribution”. It uses the binomial distribution function to estimate the probability of price reversals and sets a dual-EMA system to generate trade signals.
The logic is:
Calculate the number of up close bars in the recent 20 bars, and the percentage p of up periods in the past 100 bars.
Plug the up period counts and probability p into the binomial distribution function to compute the cumulative distribution function (CDF).
Apply 10-day and 20-day EMAs to the CDF. When the fast EMA crosses above the slow EMA, it signals a high probability of price extreme reversion, generating buy signals.
When the fast EMA crosses below the slow EMA, prices may be peaking in the short run, producing sell signals here.
The advantage of this strategy is estimating price extreme reversion timing through probability methods. But parameters need market-adjusted optimization to avoid excessive false signals.
In conclusion, statistical techniques help uncover price behavior patterns objectively. But ultimately, traders still need keen market judgment to use technical indicators as supplementary tools.
/*backtest
start: 2022-09-06 00:00:00
end: 2023-05-01 00:00:00
period: 1d
basePeriod: 1h
exchanges: [{"eid":"Futures_Binance","currency":"BTC_USDT"}]
*/
// This source code is subject to the terms of the Mozilla Public License 2.0 at https://mozilla.org/MPL/2.0/
// © pieroliviermarquis
//@version=4
strategy("Binomial Strategy", overlay=false, default_qty_type= strategy.percent_of_equity, default_qty_value= 100, slippage=1, initial_capital= 10000, calc_on_every_tick=true)
factorial(length) =>
n = 1
if length != 0
for i = 1 to length
n := n * i
n
binomial_pdf(success, trials, p) =>
q = 1-p
coef = factorial(trials) / (factorial(trials-success) * factorial(success))
pdf = coef * pow(p, success) * pow(q, trials-success)
binomial_cdf(success, trials, p) =>
q = 1-p
cdf = 0.0
for i = 0 to success
cdf := cdf + binomial_pdf(i, trials, p)
up = close[0] > close[1] ? 1 : 0
//long-term probabilities
lt_lookback = 100
lt_up_bars = sum(up, lt_lookback)
prob = lt_up_bars/lt_lookback
//lookback for cdf
lookback = 20
up_bars = sum(up, lookback)
cdf = binomial_cdf(up_bars, lookback, prob)
//ema on cdf
ema1 = ema(cdf, 10)
ema2 = ema(cdf, 20)
plot(cdf*100)
plot(ema1*100, color=color.red)
plot(ema2*100, color=color.orange)
buy = ema1 > ema2
sell = ema1 < ema2
//////////////////////Bar Colors//////////////////
var color buy_or_sell = na
if buy == true
buy_or_sell := #3BB3E4
else if sell == true
buy_or_sell := #FF006E
barcolor(buy_or_sell)
///////////////////////////Orders////////////////
if buy
strategy.entry("Long", strategy.long, comment="")
if sell
strategy.close("Long", comment="Sell")