RiskPercentage and MaxSpread Code Help

Good afternoon,
I have a simple script that I developed:

Buy Close ( 1 ) > Close ( 2) / Sell Close ( 1 ) < Close (2)

that serves me well in the type of strategy and asset use .

However wanted to add two parameters :
RiskPercent - Percentage of capital allocated to each operation , the batch varies according to the accumulated assets .
MaxSpread - maximum Spreed accepted to enter into a transaction.

Anyone can help me?

See the code below:

extern int MagicNumber=10001;
extern double Lots =0.01;
extern double StopLoss=0;
extern double TakeProfit=0;
extern int TrailingStop=0;
extern int Slippage=3;
//±-----------------------------------------------------------------+
// expert start function
//±-----------------------------------------------------------------+
int start()
{
double MyPoint=Point;
if(Digits==3 || Digits==5) MyPoint=Point*10;

double TheStopLoss=0;
double TheTakeProfit=0;
if( TotalOrdersCount()==0 )
{
int result=0;
if((Close[1]>Close[2])) // Here is your open buy rule
{
result=OrderSend(Symbol(),OP_BUY,Lots,Ask,Slippage,0,0,“xx”,MagicNumber,0,Blue);
if(result>0)
{
TheStopLoss=0;
TheTakeProfit=0;
if(TakeProfit>0) TheTakeProfit=Ask+TakeProfitMyPoint;
if(StopLoss>0) TheStopLoss=Ask-StopLoss
MyPoint;
OrderSelect(result,SELECT_BY_TICKET);
OrderModify(OrderTicket(),OrderOpenPrice(),NormalizeDouble(TheStopLoss,Digits),NormalizeDouble(TheTakeProfit,Digits),0,Green);
}
return(0);
}
if((Close[1]<Close[2])) // Here is your open Sell rule
{
result=OrderSend(Symbol(),OP_SELL,Lots,Bid,Slippage,0,0,“xx”,MagicNumber,0,Red);
if(result>0)
{
TheStopLoss=0;
TheTakeProfit=0;
if(TakeProfit>0) TheTakeProfit=Bid-TakeProfitMyPoint;
if(StopLoss>0) TheStopLoss=Bid+StopLoss
MyPoint;
OrderSelect(result,SELECT_BY_TICKET);
OrderModify(OrderTicket(),OrderOpenPrice(),NormalizeDouble(TheStopLoss,Digits),NormalizeDouble(TheTakeProfit,Digits),0,Green);
}
return(0);
}
}

for(int cnt=0;cnt<OrdersTotal();cnt++)
{
OrderSelect(cnt, SELECT_BY_POS, MODE_TRADES);
if(OrderType()<=OP_SELL &&
OrderSymbol()==Symbol() &&
OrderMagicNumber()==MagicNumber
)
{
if(OrderType()==OP_BUY)
{
if((Close[1]<Close[2])) //here is your close buy rule
{
OrderClose(OrderTicket(),OrderLots(),OrderClosePrice(),Slippage,Red);
}
if(TrailingStop>0)
{
if(Bid-OrderOpenPrice()>MyPointTrailingStop)
{
if(OrderStopLoss()<Bid-MyPoint
TrailingStop)
{
OrderModify(OrderTicket(),OrderOpenPrice(),Bid-TrailingStopMyPoint,OrderTakeProfit(),0,Green);
return(0);
}
}
}
}
else
{
if((Close[1]>Close[2])) // here is your close sell rule
{
OrderClose(OrderTicket(),OrderLots(),OrderClosePrice(),Slippage,Red);
}
if(TrailingStop>0)
{
if((OrderOpenPrice()-Ask)>(MyPoint
TrailingStop))
{
if((OrderStopLoss()>(Ask+MyPointTrailingStop)) || (OrderStopLoss()==0))
{
OrderModify(OrderTicket(),OrderOpenPrice(),Ask+MyPoint
TrailingStop,OrderTakeProfit(),0,Red);
return(0);
}
}
}
}
}
}
return(0);
}

int TotalOrdersCount()
{
int result=0;
for(int i=0;i<OrdersTotal();i++)
{
OrderSelect(i,SELECT_BY_POS ,MODE_TRADES);
if (OrderMagicNumber()==MagicNumber) result++;

}
return (result);

risk could be as simple as lot=AccountBalance()*(risk/100)

if(maxspread!=0) if((Ask-Bid)>maxspread*pt) simple max spread code