How to Combine Multiple Indicators in TradingView Pine Script

Why combine indicators and how to structure the merge

TradingView subscription tiers restrict the maximum number of simultaneous indicators you can add to a single chart (e.g. 2 indicators on Basic/Free, 5 on Essential). By merging the source code of multiple indicators into one script, you consume only a single indicator slot while enjoying all of your customary tools. Beyond saving slots, merging allows indicators to communicate directly, allowing you to create confluence rules such as buying only when an EMA crossover occurs and RSI is oversold and price touches the lower Bollinger Band.

Complete combined indicator code example: EMA + RSI + Bollinger Bands in v6

The following complete Pine Script v6 script merges three separate indicators (EMA Trend Filter, Bollinger Bands, and RSI Oscillator) into a single unified script with toggles, clean input groups, and an all-in-one confluence signal.

//@version=6
indicator("Combined Multi-Indicator Suite [v6]", overlay = true)

// ===================== INPUT GROUPS =====================
grpEma = "Trend Filter (EMA)"
showEma = input.bool(true, "Show EMA", group = grpEma)
emaLen = input.int(200, "EMA Length", group = grpEma)

grpBb = "Volatility (Bollinger Bands)"
showBb = input.bool(true, "Show Bollinger Bands", group = grpBb)
bbLen = input.int(20, "BB Length", group = grpBb)
bbMult = input.float(2.0, "BB StdDev Multiplier", group = grpBb)

grpRsi = "Momentum (RSI)"
rsiLen = input.int(14, "RSI Length", group = grpRsi)
rsiOversold = input.int(35, "RSI Oversold Level", group = grpRsi)

// ===================== CALCULATIONS =====================
// 1. EMA
emaVal = ta.ema(close, emaLen)

// 2. Bollinger Bands
[bbMiddle, bbUpper, bbLower] = ta.bb(close, bbLen, bbMult)

// 3. RSI
rsiVal = ta.rsi(close, rsiLen)

// ===================== PLOTS =====================
plot(showEma ? emaVal : na, "200 EMA", color = color.yellow, linewidth = 2)

pUpper = plot(showBb ? bbUpper : na, "BB Upper", color = color.new(color.blue, 40))
pLower = plot(showBb ? bbLower : na, "BB Lower", color = color.new(color.blue, 40))
fill(pUpper, pLower, color = showBb ? color.new(color.blue, 95) : na, title = "BB Background")

// ===================== CONFLUENCE SIGNAL =====================
// Long condition: Price above 200 EMA + Price at or below Lower BB + RSI oversold
confluenceBuy = (close > emaVal) and (close <= bbLower) and (rsiVal <= rsiOversold)

plotshape(confluenceBuy, title = "Confluence Buy Signal", 
          style = shape.labelup, location = location.belowbar, 
          color = color.green, text = "BUY", textcolor = color.white, size = size.normal)

// Unified alert
if confluenceBuy and barstate.isconfirmed
    alert("Triple confluence buy signal on " + syminfo.ticker, alert.freq_once_per_bar_close)

Step-by-step checklist for merging third-party Pine Scripts

When combining open-source scripts from TradingView Community Scripts, follow this orderly process to prevent errors:

• Unify version headers: Ensure only one //@version=6 directive exists at line 1. Convert older v4 or v5 functions (like security() or rsi()) to modern namespaces (request.security(), ta.rsi()).
• Consolidate indicator() declarations: Keep only the top-level indicator() call. Remove any additional indicator() or study() declarations.
• Search and replace variable names: Check for standard variable names like len, src, ma, upper, lower, up, down. Prefix each variable with its indicator family name (e.g. macd_src vs rsi_src).
• Organize input parameters with groups and inline formatting: Use group and inline parameters in input.* functions to keep settings clean and intuitive in the indicator dialog.

Handling overlay vs. separate pane indicators

A single Pine Script can only be either overlay = true (drawn directly over price candlesticks) or overlay = false (drawn in a separate lower sub-window). If you want to merge an overlay indicator (e.g. Supertrend) with a sub-window indicator (e.g. MACD):

• Option A (Recommended): Set overlay = true. Plot the moving averages on the chart, and plot shapes, background colors (bgcolor()), or a dashboard table (table.new()) summarizing the sub-window indicators status.
• Option B: Display the secondary oscillator in an info table in the top-right corner of the chart, showing current RSI or MACD values and status labels (Bullish / Bearish).
• Option C: Normalize oscillator values to price scale, though this can distort price perspective during major market volatility.