Backtest Example

// This source code is subject to the terms of the Mozilla Public License 2.0
// © username
// [CUCEDT-W52] Backtest Example

//@version=6
strategy("[CUCEDT-W52] Backtest Example", overlay = true, initial_capital = 100000, default_qty_type = strategy.percent_of_equity, default_qty_value = 10)

// ————— Constants
// ใช้ SNAKE_CASE สำหรับค่าคงที่ที่ไม่เปลี่ยนแปลง
int   MS_IN_HOUR = 60 * 60 * 1000
color BULL_COLOR = color.new(color.green, 50)
color BEAR_COLOR = color.new(color.red, 50)

// ————— Inputs
// ลงท้ายด้วย "Input" และจัดกลุ่ม (group) ให้เป็นระเบียบ
string groupIndi    = "Indicator Settings"
int    maFastInput  = input.int(12, "Fast MA Length", minval = 1, group = groupIndi)
int    maSlowInput  = input.int(26, "Slow MA Length", minval = 1, group = groupIndi)

string groupRisk    = "Money Management"
float  stopLossPct  = input.float(2.0, "Stop Loss (%)", minval = 0.1, step = 0.1, group = groupRisk)
float  takeProfitPct = input.float(4.0, "Take Profit (%)", minval = 0.1, step = 0.1, group = groupRisk)

// ————— Calculations
// การคำนวณตัวชี้วัด (Indicator Logic)
float maFast = ta.ema(close, maFastInput)
float maSlow = ta.ema(close, maSlowInput)

// สัญญาณซื้อขาย (Trigger Points)
bool longCondition  = ta.crossover(maFast, maSlow)
bool shortCondition = ta.crossunder(maFast, maSlow)

// ————— Strategy Calls
// การจัดการ Money Management และการคำนวณ Exit Price
float slPrice = strategy.position_avg_price * (1 - stopLossPct / 100)
float tpPrice = strategy.position_avg_price * (1 + takeProfitPct / 100)

if longCondition
    strategy.entry("Long", strategy.long, comment = "EMA Cross")

if strategy.position_size > 0
    strategy.exit("Exit Long", "Long", stop = slPrice, limit = tpPrice, comment = "TP/SL")

// ————— Visuals
plot(maFast, "Fast EMA", color = color.aqua)
plot(maSlow, "Slow EMA", color = color.orange)
plotshape(longCondition, "Buy Signal", shape.triangleup, location.belowbar, color.green, size = size.small)