Master the Grid Trading Strategy on TradingView: A Complete Pine Script Tutorial

//@version=5
strategy("Pineify Advanced Grid Strategy", overlay=true, initial_capital=10000, default_qty_type=strategy.cash, currency=currency.USD)

// ==========================================
// --- Strategy Inputs ---
// ==========================================
lowerLimit  = input.float(40000, "Lower Price Limit", minval=0, group="Grid Settings", tooltip="The bottom of your trading range")
upperLimit  = input.float(60000, "Upper Price Limit", minval=0, group="Grid Settings", tooltip="The top of your trading range")
gridCount   = input.int(10, "Number of Grids", minval=2, maxval=100, group="Grid Settings", tooltip="How many levels to divide the range into")
qtyPerGrid  = input.float(1000, "Investment per Grid (USD)", minval=1, group="Grid Settings", tooltip="Capital allocated to each buy order")

// ==========================================
// --- Grid Calculation Logic ---
// ==========================================
gridSpacing = (upperLimit - lowerLimit) / gridCount

// Initialize an array to store grid levels persistently
var float[] gridLevels = array.new_float(gridCount + 1)

if barstate.isfirst
    for i = 0 to gridCount
        array.set(gridLevels, i, lowerLimit + i * gridSpacing)

// ==========================================
// --- Execution Logic ---
// ==========================================
// Iterate through each grid level to check for execution
for i = 0 to gridCount
    float level = array.get(gridLevels, i)
    
    // Unique IDs for each grid order to track them individually
    string buyId  = "Buy_" + str.tostring(i)
    string sellId = "Sell_" + str.tostring(i)
    
    // Entry Logic: Place a limit buy order if price is near the level
    // Note: In a live environment, these would be resting limit orders.
    if close < level and strategy.position_size <= 0
        strategy.entry(buyId, strategy.long, limit=level, comment="Grid Buy @" + str.tostring(level))
    
    // Exit Logic: Place a limit sell order at the same level for the corresponding buy
    if strategy.position_size > 0
        strategy.exit(sellId, buyId, limit=level + gridSpacing, comment="Grid Sell @" + str.tostring(level + gridSpacing))

// ==========================================
// --- Visualizations ---
// ==========================================
// Plot the grid lines on the chart for visual reference
if barstate.islast
    for i = 0 to gridCount
        float level = array.get(gridLevels, i)
        line.new(bar_index[500], level, bar_index, level, color=color.new(color.gray, 70), width=1, style=line.style_dashed)