EA for executing trades based on manually drawn trendlines

If the price touches the trendline, RSI >70 then Sell, otherwise RSI <30 then Buy. 

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Sample code

//+------------------------------------------------------------------+

//| Expert Advisor using ZigZag and drawing Trendlines              |

//+------------------------------------------------------------------+

#property strict

#include <Trade\Trade.mqh>

input int ZigZagDepth=12;

input int ZigZagDeviation=5;

input int ZigZagBackstep=3;

input double LotSize=0.1;

input double StopLoss=50;

input double TakeProfit=100;

CTrade trade;

// ZigZag indicator

int zigzagHandle;

double zigzagBuffer[];

MqlRates PriceData[];

// Initialization function

int OnInit()

{

    // Load ZigZag indicator

    zigzagHandle = iCustom(Symbol(), PERIOD_CURRENT, "Examples\ZigZag", ZigZagDepth, ZigZagDeviation, ZigZagBackstep);

    if(zigzagHandle == INVALID_HANDLE)

    {

        Print("Error loading ZigZag indicator");

        return INIT_FAILED;

    }

    return INIT_SUCCEEDED;

}

// Function to check if the trendline crosses the price

bool IsTrendlineCrossPrice(datetime time1, double price1, datetime time2, double price2)

{

    if(CopyRates(Symbol(), PERIOD_CURRENT, 0, 100, PriceData) <= 0)

        return false;

    int startIndex = iBarShift(Symbol(), PERIOD_CURRENT, time1, false);

    int endIndex = iBarShift(Symbol(), PERIOD_CURRENT, time2, false);

    for(int i = startIndex; i >= endIndex; i--)

    {

        double high = PriceData[i].high;

        double low = PriceData[i].low;

        double trendPrice = price1 + (price2 - price1) * ((PriceData[i].time - time1) / (double)(time2 - time1));

        if(high >= trendPrice && low <= trendPrice)

        {

            return true; // Trendline crosses the price

        }

    }

    return false;

}

// Main function

void OnTick()

{

    if(CopyBuffer(zigzagHandle, 0, 0, 100, zigzagBuffer) <= 0)

    {

        Print("Failed to copy data from ZigZag");

        return;

    }

    if(CopyRates(Symbol(), PERIOD_CURRENT, 0, 100, PriceData) <= 0)

    {

        Print("Failed to retrieve price data");

        return;

    }

    int lastHighIndex = -1;

    int lastLowIndex = -1;

    double lastHigh = 0;

    double lastLow = 0;

    for(int i = 99; i >= 0; i--)

    {

        if(zigzagBuffer[i] > 0)

        {

            if(lastHighIndex == -1 && zigzagBuffer[i] > lastLow)

            {

                lastHigh = zigzagBuffer[i];

                lastHighIndex = i;

            }

            else if(lastLowIndex == -1 && zigzagBuffer[i] < lastHigh)

            {

                lastLow = zigzagBuffer[i];

                lastLowIndex = i;

            }

        }

    }

    if(lastHighIndex != -1 && lastLowIndex != -1)

    {

        datetime time1 = PriceData[lastHighIndex].time;

        datetime time2 = PriceData[lastLowIndex].time;

        if(!IsTrendlineCrossPrice(time1, lastHigh, time2, lastLow))

        {

            // Delete old trendlines

            ObjectDelete(0, "Trendline");

            // Draw trendline

            ObjectCreate(0, "Trendline", OBJ_TREND, 0, time1, lastHigh, time2, lastLow);

            ObjectSetInteger(0, "Trendline", OBJPROP_RAY_RIGHT, true);

            ObjectSetInteger(0, "Trendline", OBJPROP_COLOR, clrRed);

            // Get Bid/Ask prices

            double Ask = SymbolInfoDouble(Symbol(), SYMBOL_ASK);

            double Bid = SymbolInfoDouble(Symbol(), SYMBOL_BID);

            // Check trading conditions

            if(Ask > lastHigh) // Buy when price breaks ZigZag high

            {

                trade.PositionOpen(Symbol(), ORDER_TYPE_BUY, LotSize, Ask, StopLoss * _Point, TakeProfit * _Point, "Buy Order");

                Print("Buy at price: ", Ask);

            }

            else if(Bid < lastLow) // Sell when price breaks ZigZag low

            {

                trade.PositionOpen(Symbol(), ORDER_TYPE_SELL, LotSize, Bid, StopLoss * _Point, TakeProfit * _Point, "Sell Order");

                Print("Sell at price: ", Bid);

            }

        }

    }

}