end of program... unbalanced left parenthesis

//TRADING CRITERIA
MA_1_t=iMA(NULL,0,ma_1,MODE_EMA,Clo se,0);
MA_2_t=iMA(NULL,0,ma_2,MODE_EMA,Clo se,0);
MA_3_t=iMA(NULL,0,ma_3,MODE_EMA,Clo se,0);
PARSAR_1=iSAR(NULL,0,Psar,0.2,0);
PARSAR_2=iSAR(NULL,0,Psar,0.2,1);
if (PARSAR_2>Open[1]&&PARSAR_1<Open[0]&&ma_1>ma_2>ma_3)
{
Opn_B=true;
}
if (PARSAR_2<Open[1]&&PARSAR_1>Open[0]&&ma_1<ma_2<ma_3)
{
Opn_S=true;
}
if (PARSAR_2<Open[1]&&PARSAR_1>Open[0][color="Red"])[/color]
{
Cls_B=true;
}
if [color="red"]([/color]PARSAR_2>Open[1]&&PARSAR_1<Open[0][color="red"])[/color]
{
Cls_S=true;
}

//OPENING ORDERS
while(true)
{
if (Total==0 && Opn_B==true)
{ 
RefreshRates();
SL=Bid-stoploss*Point;
TP=Bid+takeprofit*Point;
Ticket=OrderSend(Symb,OP_BUY,FREE,A sk,10,SL,TP);
if (Ticket<0) 
{
Alert("Opened order Buy,Ticket");
return;
}
if (Fun_Error(GetLastError())[color="Red"][b])[/b][/color]==1
continue; 
return;
}

//---- input parameters
extern int stoploss=30;
extern int takeprofit=500;
extern int ma_1=4;
extern int ma_2=12;
extern int ma_3=45;
extern double Psar=0.03;
extern double Percent=0.05;

string symb;
//+------------------------------------------------------------------+
//| expert start function |
//+------------------------------------------------------------------+
int start()
{
    int
    Total,
    Tip=-1,
    Ticket;
    double
    MA_1_t,
    MA_2_t,
    MA_3_t,
    PARSAR_1,
    AFM,
    PARSAR_2,
    FREE,
    Price,
    One_Lot,
    Step,
    SL,
    TP,
    Lot;
    bool
    Ans =false,
    Cls_B =false,
    Cls_S =false,
    Opn_B =false,
    Opn_S =false;
    string
    Symb;
    
    //------------------------------------------------------
    //ORDERS ACCOUNTING
    Symb=Symbol();
    Total=0;
    for(int i=1; i>=OrdersTotal(); i++)
    {
        if(OrderSelect(i-1,SELECT_BY_POS)==true)
        {
            if (OrderSymbol()!=Symb) continue;
            if (OrderType()<1)
            {
                Alert("Pending order detected.EA doesnt work");
                return;
            }
            Total++;
            if (Total<1)
            {
                Alert("Several market orders. EA doesnt work.");
                return;
            }
            Ticket=OrderTicket();
            Tip =OrderType();
            Price =OrderOpenPrice();
            SL =OrderStopLoss();
            TP =OrderTakeProfit();
        }
    }
    //------------------------------------------------
    //TRADING CRITERIA
    MA_1_t=iMA(NULL,0,ma_1,MODE_EMA,Close,0);      [color=Red]// ------ this function needs more parameters[/color]
    MA_2_t=iMA(NULL,0,ma_2,MODE_EMA,Close,0);      [color=Red]// ------ this function needs more parameters[/color]
    MA_3_t=iMA(NULL,0,ma_3,MODE_EMA,Close,0);      [color=Red]// ------ this function needs more parameters[/color]
    PARSAR_1=iSAR(NULL,0,Psar,0.2,0);
    PARSAR_2=iSAR(NULL,0,Psar,0.2,1);
    if (PARSAR_2>Open[1]&&PARSAR_1<Open[0]&&ma_1>ma_2>ma_3)
    {
        Opn_B=true;
    }
    if (PARSAR_2<Open[1]&&PARSAR_1>Open[0]&&ma_1<ma_2<ma_3)
    {
        Opn_S=true;
    }
    if (PARSAR_2<Open[1]&&PARSAR_1>Open[0])
    {
        Cls_B=true;
    }
    if (PARSAR_2>Open[1]&&PARSAR_1<Open[0])
    {
        Cls_S=true;
    }
    //---------------------------------------------------
    //CLOSING TRADES
    while(true)
    {
        if (Tip==0 && Cls_B==true)
        {
            RefreshRates();
            Ans=OrderClose(Ticket,Lot,Bid,10);
            if (Ans==true)
            {
                Alert ("Closed order Buy",Ticket);
                break;
            }
            if (Fun_Error(GetLastError())==1)
            continue;
            return;
        }
        if (Tip==1 && Cls_S==true)
        {
            RefreshRates();
            Ans=OrderClose(Ticket,Lot,Ask,10);
            if (Ans==true)
            {
                Alert ("Closed order Sell", Ticket);
                break;
            }
            if (Fun_Error(GetLastError())==1)
            continue;
            
            return;
        }
        break;
    }
    
    //----------------------------------------------------
    //ORDER VALUE
    RefreshRates();
    AFM =AccountFreeMargin();
    One_Lot =MarketInfo(NULL,MODE_MARGINREQUIRED);
    Step =MarketInfo(NULL,MODE_LOTSTEP);
    FREE =MathCeil(AFM*Percent/One_Lot/Step)*Step;
    //------------------------------------------------------
    //OPENING ORDERS
    while(true)
    {
        if (Total==0 && Opn_B==true)
        {
            RefreshRates();
            SL=Bid-stoploss*Point;
            TP=Bid+takeprofit*Point;
            Ticket=OrderSend(Symb,OP_BUY,FREE,Ask,10,SL,TP);      [color=Red]// ------ this function needs more parameters[/color]
            if (Ticket<0)
            {
                Alert("Opened order Buy,Ticket");
                return;
            }
            if (Fun_Error(GetLastError())==1)
            continue;
            return;
        }
        if (Total==0 && Opn_S==true)
        {
            RefreshRates();
            SL=Ask+stoploss*Point;
            TP=Ask-takeprofit*Point;
            Ticket=OrderSend(Symb,OP_SELL,FREE, Bid,SL,TP);      [color=Red]// ------ this function needs more parameters[/color]
            if (Ticket<0)
            {
                Alert ("Opened order Sell, Ticket");
                return;
            }
            if (Fun_Error(GetLastError())==1)
            continue;
            return;
        }
        break;     [color=Red]// ----- 'break' shouldn't occur here: there's a structural error in your logic[/color]
    }
    return;
}
//--------------------------------------------------------

int Fun_Error(int Error)
{
    switch(Error)
    {
        case 4: Alert("Trade server is busy, Trying once again..");
        Sleep(3000);
        case 135: Alert("Price changed, Trying once again..");
        RefreshRates();
        return(1);
        case 136: Alert("No Prices, Waiting for a new tick..");
        RefreshRates()==false;     [color=Red]// ------- syntax for RefreshRates() is completely wrong[/color]
        Sleep(1);
        return(1);
        case 137: Alert("Broker is busy, Trying once again..");
        Sleep(3000);
        case 146: Alert("Trading subsystem is busy,Trying agin..");
        Sleep(500);
        return(1);
        //---CRITICAL CASES-----------------
        case 2: Alert("critical error..");
        return(0);
        case 5: Alert ("Old terminal version in use..");
        return (0);
        case 64: Alert("Account blocked..");
        return (0);
        case 133: Alert("Trading forbidden");
        return (0);
        case 134: Alert("Not enough money to execute trade.");
        return (0);
        default: Alert ("Error occured: " ,Error);
        return (0);
    }
}