ATR Trend Follow for US500 (S&P 500)

Volatility-adjusted trend following — trail stops by ATR multiples.

Why ATR Trend Follow Works on US500

A simple EMA trend with ATR-based exits. Stop and trailing stop scale with the asset's realised volatility, so the same code works on quiet EUR/USD and wild Bitcoin. ATR multipliers (typically 2-3×) are the only parameter you need to tune per market.

The S&P 500 (US500) is the global benchmark equity index. Strong long-term uptrend with regime shifts; momentum and trend bots dominate, mean-reversion works in QE periods only.

Equity indices reflect aggregate corporate earnings, sentiment, and Fed policy. They trend more cleanly than individual stocks and gap less than commodities.

Pine Script Source

Copy this into PineForge — backtest on US500 or any supported symbol, then deploy as a live bot.

//@version=5
strategy("ATR Trend Follow", overlay=true)

ema_len = input.int(21, "EMA Length")
atr_len = input.int(14, "ATR Length")
atr_mult = input.float(2.5, "ATR Multiplier")

ema = ta.ema(close, ema_len)
atr = ta.atr(atr_len)

long_stop = close - atr * atr_mult

if close > ema and close[1] <= ema[1]
    strategy.entry("Long", strategy.long)

if strategy.position_size > 0
    strategy.exit("Trail", from_entry="Long", stop=long_stop)