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    for (i =   OrdersTotal () - 1   ; i >= 0 ; i -- )            
    {//for2
    if (OrderSelect(i, SELECT_BY_POS)

    && OrderSymbol () == Symbol() 
    && diference <= OrderProfit () )

1. Always count down - good
2. Always test return code - good
3. Not filtering by magic number makes the EA incompatible with every other including manual trading.
4. Since the thought is to select an order, I make it one statement with the open brace at the end. The FOR doesn't need a brace:

       for (int pos = OrdersTotal () - 1; pos >= 0; pos--) if(
          OrderSelect(pos, SELECT_BY_POS)
       && OrderMagicNumber() == magic.number
       && OrderSymbol()      == Symbol()
       && diference          <= OrderProfit () 
       ){
          :

   ---

5.  && course + diference <= OrderOpenPrice () )

   Bid >= OrderOpenPrice() + diference // Bid above OOP by 'diference'

   ---

6. but without effects
   Is the order still open? The above will not get closed orders.

       datetime lastClose;
       for(int pos= OrdersHistoryTotal() - 1; pos--) if (
           OrderSelect(pos, SELECT_BY_POS, MODE_HISTORY)   // Only orders w/
       &&  OrderCloseTime()    > lastClose                 // not yet processed,
       &&  OrderMagicNumber()  == magic.number             // my magic number
       &&  OrderSymbol()       == Symbol()                 // and my pair.
       &&  OrderType()         <= OP_SELL // Avoid cr/bal forum.mql4.com/32363#325360
       ){
           lastClose = OrderCloseTime();
           double lastTicket = OrderTicket()
           :

   
   

You have the code already . . . I made some small modifications . . .

 for ( i = OrdersTotal()-1; i>=0; i-- )
        if (OrderSelect(i, SELECT_BY_POS)
        && OrderMagicNumber() == MagicNumber         //  if you don't use a Magic Number leave this out
        && OrderSymbol() == Symbol() 
        && OrderType() < OP_BUYLIMIT                 //   this selects BUY and SELL orders
        && OrderProfit() >= variable )
              {

&& OrderMagicNumber () == Ticket

 && diference <= OrderProfit () )<--------- what type of variable you "define" diference? is it pips? price? dollars? or dime? your base currency?

double point = MarketInfo(Symbol(),MODE_POINT);
double diference = 20 * point;

2.RaptorUK

 for ( i = OrdersTotal()-1; i>=0; i-- )
        if (OrderSelect(i, SELECT_BY_POS)
        && OrderMagicNumber() == MagicNumber         //  if you don't use a Magic Number leave this out
        && OrderSymbol() == Symbol() 
        && OrderType() < OP_BUYLIMIT                 //   this selects BUY and SELL orders
        && OrderProfit() >= variable )
              {																						

Why You have use?:	 && OrderType() < OP_BUYLIMIT  ?

3.WHRoeder 2011.09.26 20:27 
&& OrderMagicNumber () == Ticket
will never be true.


I know and, only use it as a Variable, sorry it should be written OrderMagicNumber () == MagicNumber 

Then the problem is obvious:

double point = MarketInfo(Symbol(),MODE_POINT);
double diference = 20 * point; -------------------------------> diference is always 20*Point = 20 PIP (or 0.2 if fractional-point instrument)

but:

 && diference <= OrderProfit () )<--------- OrderProfit () returns PROFIT in terms of BASE CURRENCY, (not PIP)

In terms of computational, the above condition may be OK and not erroneous because it gives a BOOLEAN result.
In terms of common sense, it is no sense to compare one value (in PIPS) with another value in (Dollars, Dimes, Pennis, etc, your BASE currncy).

As an illustration only;
Case 0: Suppose Profit for 10 Lot goes above 20 Dollars (not pips), then TRUE. Pips gain = 0.2 Pips. 
Case 1: Suppose Profit for 1 Lot goes above 20 Dollars (not pips), then TRUE. Pips gain = 2 Pips.  
Case 2: Suppose Profit for 0.1 Lot goes above 20 Dollars (not pips), then TRUE. Pips gain = 20 Pips.
Case 3: Suppose Profit for 0.01 Lot order goes above 20 Dollars (not pips), then TRUE. Pips gain = 200 Pips???

Conclusion: 
It may be right computationally only, but senseless to compare such varying PIPs against a fixed amount in (Dollars, Dimes, Pennis, etc, your BASE currncy).