How It Trades
- Compute a 200-bar SMA (the long-term trend filter) and the highest and lowest close of the last 7 bars.
- Buy when today's close is the lowest of the past 7 bars while price is still above the 200-bar average: a short-term pullback inside a long-term uptrend.
- Sell when today's close is the highest of the past 7 bars: the pullback has fully recovered.
Example Strategy
Pine Script
Paste it into TradingView’s Pine Editor to run these rules on any chart.
//@version=6
// Double 7 — sort.finance. Fills at the signal bar's close, 0.02% fee a side,
// whole account per trade, as the backtest. History and indicator warm-up
// differ from the site's, so expect close to the same trades, not identical.
strategy("Double 7", overlay=true,
initial_capital=100, default_qty_type=strategy.percent_of_equity,
default_qty_value=100, commission_type=strategy.commission.percent,
commission_value=0.02, process_orders_on_close=true, pyramiding=0)
// The bar the current position opened on, and the bar the last one closed on.
var int entryBar = na
var int exitBar = -1
// ── Signals ──────────────────────────────────────────────────────────────
lowest = ta.lowest(close, 7)
highest = ta.highest(close, 7)
regime = ta.sma(close, 200)
enterNow = close <= lowest and close > regime
exitNow = close >= highest
// ── Orders ───────────────────────────────────────────────────────────────
// Open on the first bar the entry holds while flat; close on the first
// later bar the exit holds; never reopen on the bar a position closed.
inTrade = strategy.position_size != 0
if inTrade and bar_index > entryBar and exitNow
strategy.close("Long")
exitBar := bar_index
else if not inTrade and bar_index > exitBar and enterNow
strategy.entry("Long", strategy.long)
entryBar := bar_index
// ── Drawing ──────────────────────────────────────────────────────────────
plot(regime, "SMA 200", color=#8a92a0)
plot(lowest, "7-Bar Low", color=#e0a03a)
plot(highest, "7-Bar High", color=#4d8dff)