Pine Script Strategy: The Complete 2025 Guide to Writing TradingView Strategies

What Is Pine Script and Why Does It Matter?

Pine Script is TradingView's built-in scripting language. It lets you define custom indicators, strategies, and alerts that run directly on TradingView charts — without any external software, brokerage account, or Python knowledge required.

As of 2025, Pine Script v6 is the current version. It brings significant improvements over v4/v5, including cleaner function namespaces, better type safety, and first-class support for multi-timeframe (MTF) analysis.

The key difference between a Pine Script indicator and a Pine Script strategy is that a strategy can simulate trades and report backtest statistics like net profit, drawdown, Sharpe ratio, and win rate — directly inside TradingView's Strategy Tester.

The strategy() Declaration — Your Starting Point

Every Pine Script strategy begins with a strategy() call. This sets up your script's metadata and tells TradingView how to calculate performance metrics.

//@version=6
strategy(
  title            = "My EMA Strategy",
  overlay          = true,
  initial_capital  = 10000,
  default_qty_type = strategy.percent_of_equity,
  default_qty_value = 10,
  commission_type  = strategy.commission.percent,
  commission_value = 0.05
)

• overlay = true — draws on the price chart (not a separate pane)
• initial_capital — starting balance for backtesting (USD)
• default_qty_type — how position size is calculated (percent of equity, fixed lots, etc.)
• commission_value — realistic brokerage fee to simulate real-world performance

Defining Entry and Exit Rules

A strategy needs at minimum one entry signal and one exit signal. The most common pattern uses a crossover between two moving averages to determine trend direction.

fastEma = ta.ema(close, 9)
slowEma = ta.ema(close, 21)

longEntry  = ta.crossover(fastEma, slowEma)
shortEntry = ta.crossunder(fastEma, slowEma)

strategy.entry("Long",  strategy.long,  when = longEntry)
strategy.entry("Short", strategy.short, when = shortEntry)

Stop Losses and Take Profits

Risk management is the most important part of any strategy. Pine Script supports ATR-based stops, fixed-point stops, and percentage stops — all set via strategy.exit().

atrVal  = ta.atr(14)
stopDist = atrVal * 1.5
tpDist   = atrVal * 3.0

strategy.exit(
  id        = "Long Exit",
  from_entry = "Long",
  stop      = strategy.position_avg_price - stopDist,
  limit     = strategy.position_avg_price + tpDist
)

Backtesting Your Strategy on TradingView

Once your strategy is written, click the 'Strategy Tester' tab at the bottom of TradingView. You'll see a full performance report including net profit, max drawdown, total trades, win rate, and profit factor.

A strategy worth trading typically shows: profit factor > 1.5, win rate > 45%, max drawdown < 20%, and at least 100 trades in the backtest window.

Change the chart timeframe and symbol to stress-test across different market conditions. A strategy that only works on one specific chart is likely curve-fitted.

Use AI to Write Pine Script Strategies Faster

Writing Pine Script manually has a steep learning curve. TradePilot is an AI tool that generates complete, compilable Pine Script v6 strategies from plain English descriptions — including proper stop losses, take profits, alerts, and backtesting setup.

Instead of spending hours debugging syntax errors, you describe your strategy idea and receive working code in seconds. TradePilot's Apex Pro model asks clarifying questions about your timeframe, risk style, and entry logic before generating — so the output fits your exact requirements.