Stochastic strategy backtest results

The short answer

Answers here: Does the stochastic crossover strategy work? · What is its win rate? · 14,3,3 or faster? · Long only, or both ways?

What the script does

Stochastic Strategy, from the strategy library.

The numbers, run by run

Net and holding the symbol are after costs over the same period. Held-out is the verdict on the last third of the history judged alone: survived, decayed, did not survive, or too few trades to judge.

Year by year

14, 3, 3, 80/20 on SPY, long and short, the same rule long only, and SPY itself, each calendar year after costs. A partial first or last year counts the sessions it has.

Every trade

The 142 trades of 14, 3, 3, 80/20 on SPY, long and short, oldest first: side, entry and exit days, fill prices after slippage, and the return after both commissions. The other runs' trades open below.

The script

Pine v6, exactly as it ran for 14, 3, 3, 80/20 on SPY, long and short. The variants change only the inputs listed in the table.

//@version=6
strategy("Stochastic Strategy", overlay=false, default_qty_type=strategy.percent_of_equity, default_qty_value=100, initial_capital=100000, commission_type=strategy.commission.percent, commission_value=0.05, slippage=1, margin_long=0, margin_short=0)

len      = input.int(14, "%K length", minval=1, group="Setup")
smK      = input.int(3, "%K smoothing", minval=1, group="Setup")
smD      = input.int(3, "%D smoothing", minval=1, group="Setup")
ob       = input.int(80, "Overbought", minval=50, maxval=100, group="Levels")
os       = input.int(20, "Oversold", minval=0, maxval=50, group="Levels")
useLong  = input.bool(true, "Trade longs", group="Direction")
useShort = input.bool(true, "Trade shorts", group="Direction")
atrLen   = input.int(14, "ATR length", minval=1, group="Risk")
stopMult = input.float(2, "Stop (ATR multiples, 0 = off)", minval=0, step=0.5, group="Risk")

k   = ta.sma(ta.stoch(close, high, low, len), smK)
d   = ta.sma(k, smD)
atr = ta.atr(atrLen)

// every cross computed every bar; the zone decides which one counts
upCross   = ta.crossover(k, d)
downCross = ta.crossunder(k, d)
longSig   = upCross and k < os and barstate.isconfirmed
shortSig  = downCross and k > ob and barstate.isconfirmed
exitLong  = downCross and k > 50 and barstate.isconfirmed
exitShort = upCross and k < 50 and barstate.isconfirmed

plot(k, "%K", color=color.new(#16A56A, 0), linewidth=2)
plot(d, "%D", color=color.new(#E5484D, 0), linewidth=1)
hOb = hline(ob, "Overbought", color=color.new(#E5484D, 50), linestyle=hline.style_dashed)
hOs = hline(os, "Oversold", color=color.new(#16A56A, 50), linestyle=hline.style_dashed)
hline(50, "Mid", color=color.new(#A3A39E, 70), linestyle=hline.style_dotted)
fill(hOb, hOs, color=color.new(#A3A39E, 94), title="Neutral zone")

if longSig and useLong
    strategy.entry("Long", strategy.long)
    strategy.exit("Long stop", "Long", stop=stopMult > 0 ? close - stopMult * atr : na)
if shortSig and useShort
    strategy.entry("Short", strategy.short)
    strategy.exit("Short stop", "Short", stop=stopMult > 0 ? close + stopMult * atr : na)
if exitLong
    strategy.close("Long")
if exitShort
    strategy.close("Short")

How it was tested

Alpaca daily data since 2016, and 5-minute data from the last 600 sessions, 0.05% commission and 0.025% slippage on every fill, the last third of the history held out, textbook settings and nothing tuned. The engine, fills and what it does not model are written out once, in data and methodology.

Questions