Fix an EA that isn't performing in the Strategy Tester

The specifications:

This EA uses the RSI exclusively for trade opens and closes.  The RSI crosses 50 moving upward and alerts the EA to watch.  When it reaches 53 it triggers a buy order.  When the RSI reaches 70, it triggers a close order.  Conversely, when the RSI crosses 50 moving downward, it alerts the EA.  When it reaches 47 it triggers a sell order.  This order is closed at RSI 30.  There is also a contingency if the RSI crosses over the 50 moving the opposite direction that the trade would close.  

As much is in the existing code.

Currently, the EA will only open and close one trade in the Strategy Tester.  I would like you to modify the EA to operate according to these specifications.  

I would also like you to add a trailing stop that can be adjusted.

Here is the existing code:

// Global Variables

enum StateType {WATCHING, LONG_ENTRY, SHORT_ENTRY, CLOSE_TRADE};

StateType state = WATCHING;

double LotSize = 0.1;  // Lot size

double StopLoss = 20.0 * Point;  // Stop loss in price difference

double TakeProfit = 100.0 * Point;  // Take profit in price difference

int slippage = 3;

int RSI_Period = 14;

// OnTick function

void OnTick() {

    double currentRSI = iRSI(Symbol(), 0, RSI_Period, PRICE_CLOSE, 0);

    double previousRSI = iRSI(Symbol(), 0, RSI_Period, PRICE_CLOSE, 1);

    if (state == WATCHING) {

        if (currentRSI > 50 && previousRSI <= 50) {

            state = LONG_ENTRY;

        } else if (currentRSI < 50 && previousRSI >= 50) {

            state = SHORT_ENTRY;

        }

    }

    if (state == LONG_ENTRY && currentRSI >= 53) {

        PlaceLongOrder();

    } else if (state == SHORT_ENTRY && currentRSI <= 47) {

        PlaceShortOrder();

    }

    if (state == CLOSE_TRADE) {

        CloseTrade(currentRSI);

    }

}

// Function to place a long order

void PlaceLongOrder() {

    if (OrdersTotal() == 0) {

        double price = Ask;

        int ticket = OrderSend(Symbol(), OP_BUY, LotSize, price, slippage, price - StopLoss, price + TakeProfit, "Buy Order", 0, 0, clrGreen);

        if (ticket > 0) state = CLOSE_TRADE;

    }

}

// Function to place a short order

void PlaceShortOrder() {

    if (OrdersTotal() == 0) {

        double price = Bid;

        int ticket = OrderSend(Symbol(), OP_SELL, LotSize, price, slippage, price + StopLoss, price - TakeProfit, "Sell Order", 0, 0, clrRed);

        if (ticket > 0) state = CLOSE_TRADE;

    }

}

// Function to close the trade based on RSI

void CloseTrade(double currentRSI) {

    for (int i = 0; i < OrdersTotal(); i++) {

        if (OrderSelect(i, SELECT_BY_POS) && OrderSymbol() == Symbol()) {

            if ((OrderType() == OP_BUY && currentRSI >= 70) || (OrderType() == OP_SELL && currentRSI <= 30)) {

                bool closed = OrderClose(OrderTicket(), OrderLots(), (OrderType() == OP_BUY ? Bid : Ask), 3, clrRed);

                if (closed) state = WATCHING;

            } else if ((OrderType() == OP_BUY && currentRSI < 50) || (OrderType() == OP_SELL && currentRSI > 50)) {

                closed = OrderClose(OrderTicket(), OrderLots(), (OrderType() == OP_BUY ? Bid : Ask), 3, clrRed);

                if (closed) state = WATCHING;

            }

        }

    }

}