Pine Script request.security: Complete Multi-Timeframe and Symbol Guide

request.security() syntax and parameters in Pine Script v6

The request.security() function is Pine Scripts primary mechanism for intermarket analysis and multi-timeframe (MTF) trading logic. Whether pulling SPY index returns onto an individual stock chart, comparing gold against the US dollar, or displaying a 4-hour EMA on a 5-minute execution chart, request.security handles the data alignment between differing resolution feeds.

How to prevent lookahead bias and repainting in request.security

The most dangerous pitfall in Pine Script is historical lookahead bias caused by improper request.security configuration. When you request a higher timeframe (such as daily) from an intraday chart (such as 15-minute), TradingViews backtesting engine can accidentally look ahead to the daily close before the 15-minute bar actually occurred. This produces impossibly profitable backtests that fail in live trading.

Complete multi-timeframe indicator code example in Pine Script v6

This script demonstrates how to request a higher-timeframe 200 EMA and Daily High/Low using tuple batching and non-repainting offsets.

//@version=6
indicator("MTF Trend & Range [v6]", overlay = true)

// User settings
htfTimeframe = input.timeframe("D", "Higher Timeframe")
emaLength = input.int(200, "HTF EMA Length")

// Calculate the EMA expression on the higher timeframe
// Using [1] offset ensures we only look at COMPLETED higher-timeframe bars
htfEmaCalc = ta.ema(close, emaLength)[1]

// Batch request multiple values as a tuple to optimize performance
[htfEma, prevHigh, prevLow] = request.security(
     syminfo.tickerid, 
     htfTimeframe, 
     [htfEmaCalc, high[1], low[1]], 
     barmerge.gaps_off, 
     barmerge.lookahead_off
)

// Plots
plot(htfEma, "Daily 200 EMA (Non-Repainting)", color = color.yellow, linewidth = 2)
plot(prevHigh, "Previous Day High", color = color.green, style = plot.style_circles)
plot(prevLow, "Previous Day Low", color = color.red, style = plot.style_circles)

// Background color based on HTF trend
isBullishTrend = close > htfEma
bgcolor(isBullishTrend ? color.new(color.green, 95) : color.new(color.red, 95), title = "Trend Background")

Tuple batching and resource limits optimization

TradingView limits each script to a maximum number of concurrent request.security() calls (usually 40). If you make individual calls for open, high, low, close, volume, and multiple EMAs, you quickly exhaust your quota and degrade chart performance. Always batch requests into tuples: request.security(..., [open[1], high[1], low[1], close[1]]) counts as only ONE security call while retrieving all four price series at once.

• Batch expressions into tuples: Group open, high, low, close, and indicators into a single tuple return [val1, val2, val3].
• Avoid calling security inside user functions: Placing request.security inside a loop or custom function called multiple times creates duplicate request contexts.
• Use timeframe.period comparisons: Ensure the requested timeframe is strictly greater than or equal to the chart timeframe to avoid lower-timeframe resolution misalignment.