动态供需区间中线反转策略

/*backtest
start: 2025-02-16 00:00:00
end: 2025-02-23 00:00:00
period: 10m
basePeriod: 1m
exchanges: [{"eid":"Futures_CTP","currency":"FUTURES"}]
*/

// This Pine Script™ code is subject to the terms of the Mozilla Public License 2.0 at https://mozilla.org/MPL/2.0/
// © bommytarton

//@version=6
strategy("Midline Rejection Entry with TP/SL at Supply/Demand", overlay=true)

// User inputs for Swing Length and Length for Supply/Demand Zones
length = input.int(50, title="Swing Length", minval=1)
midlineLength = input.int(20, title="Midline Length for Trend", minval=1)  // Moving average length for trend

// Identify swing highs (Supply Zone) and swing lows (Demand Zone)
supplyZone = ta.highest(high, length) // Supply Zone (resistance)
demandZone = ta.lowest(low, length) // Demand Zone (support)

// Calculate the midpoint between supply and demand zones
midpoint = (supplyZone + demandZone) / 2

// Trend Detection: Use a simple moving average (SMA) for trend direction
smaTrend = ta.sma(close, midlineLength)

// Variables to store Supply/Demand Zones at the time of entry
var float entrySupplyZone = na
var float entryDemandZone = na
var float entryMidpoint = na

// Entry Conditions
// 1. Price in an uptrend (close above SMA)
longCondition = close > smaTrend and close < midpoint and close > open and open < close[1] and close[1] < open[1]

// 1. Price in a downtrend (close below SMA)
shortCondition = close < smaTrend and close > midpoint and close < open and open > close[1] and close[1] > open[1]

// Close any open trades before opening a new one
if (longCondition or shortCondition)
    strategy.close_all()

// Execute the entry logic
if (longCondition)
    entrySupplyZone := supplyZone  // Store Supply Zone for Take Profit
    entryDemandZone := demandZone  // Store Demand Zone for Stop Loss
    entryMidpoint := midpoint      // Store Midpoint
    strategy.entry("Long", strategy.long)
    label.new(bar_index, low, "Open Long", color=color.green, textcolor=color.white, style=label.style_label_up, size=size.small)

if (shortCondition)
    entrySupplyZone := supplyZone  // Store Supply Zone for Stop Loss
    entryDemandZone := demandZone  // Store Demand Zone for Take Profit
    entryMidpoint := midpoint      // Store Midpoint
    strategy.entry("Short", strategy.short)
    label.new(bar_index, high, "Open Short", color=color.red, textcolor=color.white, style=label.style_label_down, size=size.small)

// Define Take Profit and Stop Loss Levels for Long/Short Trades
if (strategy.opentrades > 0)
    // For Long trades, use Supply Zone for Take Profit and Demand Zone for Stop Loss
    if (strategy.position_size > 0)
        strategy.exit("Take Profit", "Long", limit=entrySupplyZone)  // Take Profit at Supply Zone
        strategy.exit("Stop Loss", "Long", stop=entryDemandZone)    // Stop Loss at Demand Zone


    // For Short trades, use Demand Zone for Take Profit and Supply Zone for Stop Loss
    if (strategy.position_size < 0)
        strategy.exit("Take Profit", "Short", limit=entryDemandZone)  // Take Profit at Demand Zone
        strategy.exit("Stop Loss", "Short", stop=entrySupplyZone)     // Stop Loss at Supply Zone


// Re-Plot Supply, Midpoint, and Demand Zones after Trade Closure
plot(supplyZone, title="Supply Zone", color=color.red, linewidth=2, style=plot.style_line)
plot(demandZone, title="Demand Zone", color=color.green, linewidth=2, style=plot.style_line)
plot(midpoint, title="Midpoint", color=color.blue, linewidth=1, style=plot.style_line)

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