Supertrend 17/3.2

// This Pine Script™ code is subject to the terms of the Mozilla Public License 2.0 at https://mozilla.org/MPL/2.0/
// © TrendLab - Generated from Strategy Artifact

//@version=6
strategy("Supertrend 17/3.2", overlay=true, default_qty_type=strategy.percent_of_equity, default_qty_value=100, initial_capital=100000, commission_type=strategy.commission.percent, commission_value=0.1, slippage=1)

// =============================================================================
// INPUTS
// =============================================================================
atrPeriod = input.int(17, "ATR Period", minval=1)
multiplier = input.float(3.2, "Multiplier", minval=0.1, step=0.1)

// =============================================================================
// INDICATOR CALCULATION
// =============================================================================
[supertrend, direction] = ta.supertrend(multiplier, atrPeriod)

// Direction: -1 = uptrend (price above supertrend), 1 = downtrend (price below supertrend)
isUptrend = direction < 0
isDowntrend = direction > 0

// Detect trend changes
trendChangeUp = ta.crossunder(direction, 0)    // Direction crosses from positive to negative
trendChangeDown = ta.crossover(direction, 0)   // Direction crosses from negative to positive

// =============================================================================
// STRATEGY LOGIC
// =============================================================================
// Entry: Supertrend flips to uptrend (direction changes from 1 to -1)
// Exit: Supertrend flips to downtrend (direction changes from -1 to 1)

if trendChangeUp
    strategy.entry("Long", strategy.long)

if trendChangeDown
    strategy.close("Long")

// =============================================================================
// PLOTTING
// =============================================================================
// Plot supertrend line with color based on direction
supertrendColor = isUptrend ? color.green : color.red
plot(supertrend, "Supertrend", color=supertrendColor, linewidth=2)

// Plot entry/exit signals
plotshape(trendChangeUp, "Entry Signal", shape.triangleup, location.belowbar, color.green, size=size.small)
plotshape(trendChangeDown, "Exit Signal", shape.triangledown, location.abovebar, color.red, size=size.small)

// Background color for trend direction
bgcolor(isUptrend ? color.new(color.green, 95) : color.new(color.red, 95))