গতিশীল ট্রেন্ডলাইন ব্রেকআউটের জন্য উন্নত দীর্ঘ কৌশল

/*backtest
start: 2019-12-23 08:00:00
end: 2024-12-09 08:00:00
period: 1d
basePeriod: 1d
exchanges: [{"eid":"Futures_Binance","currency":"BTC_USDT"}]
*/

//@version=5
strategy("Long Only Strategy with Dynamic Trend Lines, Fixed TP/SL, and Trailing SL+", overlay=true, 
         default_qty_type=strategy.percent_of_equity, default_qty_value=10, 
         pyramiding=0, // Prevent multiple entries
         calc_on_order_fills=true, 
         calc_on_every_tick=true)

// === Parameters ===
swingThreshold = input.int(5, title="Swing Detection Threshold")
tpPercent = input.float(2.0, title="Take Profit (%)")
slPercent = input.float(1.0, title="Stop Loss (%)")
trailPercent = input.float(1.0, title="Trailing Stop (%)")
volumeThresholdMultiplier = input.float(1.5, title="Volume Spike Threshold (x MA)")

// === Volume Indicator ===
avgVolume = ta.sma(volume, 20)
volumeSpike = volume > (avgVolume * volumeThresholdMultiplier)

// === Detect Swing High ===
isSwingHigh = ta.pivothigh(high, swingThreshold, swingThreshold)

// Variables to store swing highs
var float swingHigh1 = na
var float swingHigh2 = na
var int swingHighBar1 = na
var int swingHighBar2 = na

// Update swing highs
if (isSwingHigh)
    swingHigh2 := swingHigh1
    swingHighBar2 := swingHighBar1
    swingHigh1 := high[swingThreshold]
    swingHighBar1 := bar_index - swingThreshold

// === Calculate Upper Trend Line ===
var float upperSlope = na
var float upperIntercept = na

// Calculate slope and intercept for upper trend line if there are two swing highs
if (not na(swingHigh1) and not na(swingHigh2))
    deltaX = swingHighBar1 - swingHighBar2
    if (deltaX != 0)
        upperSlope := (swingHigh1 - swingHigh2) / deltaX
        upperIntercept := swingHigh1 - (upperSlope * swingHighBar1)
    else
        upperSlope := 0
        upperIntercept := swingHigh1

// Calculate trend line price for the current bar
var float upperTrendPrice = na
if (not na(upperSlope) and not na(upperIntercept))
    upperTrendPrice := upperSlope * bar_index + upperIntercept

// Calculate trend line price for the previous bar
var float upperTrendPrice_prev = na
if (not na(upperSlope) and not na(upperIntercept))
    upperTrendPrice_prev := upperSlope * (bar_index - 1) + upperIntercept

// === Buy Condition Based on Trend Line Breakout ===

// Buy Signal: Price breaks above Upper Trend Line with volume spike
breakoutBuyCondition = (not na(upperTrendPrice)) and 
                       (close > upperTrendPrice) and 
                       (not na(upperTrendPrice_prev)) and 
                       (close[1] <= upperTrendPrice_prev) and 
                       volumeSpike

// === Manage Single Position ===

// Calculate Take Profit and Stop Loss levels based on percentage
longTakeProfit = close * (1 + tpPercent / 100)
longStopLoss = close * (1 - slPercent / 100)

// Calculate Trailing Stop as trail_offset (in price)
trail_offset = close * (trailPercent / 100)

// Execute Trade with Single Position Management
if (breakoutBuyCondition)
    // Close existing short position if any
    if (strategy.position_size < 0)
        strategy.close("Sell")
    // Open long position
    strategy.entry("Buy", strategy.long)
    // Set Take Profit, Stop Loss, and Trailing Stop Loss for long position
    strategy.exit("Take Profit Buy", from_entry="Buy", limit=longTakeProfit, stop=longStopLoss, trail_offset=trail_offset)

// Plot Buy Signal
plotshape(breakoutBuyCondition, title="Buy Signal", location=location.belowbar, color=color.green, style=shape.labelup, text="BUY")