.: I need help again - IMPORTANT, NOT RESOLVED PROBLEM:. How to modify, lookup and close opened orders in MQL ?

I have the medium level in MQL programming but I would like to learn more in practice.

For example we have 3 (three) opened orders:


[1st order1009]
Order=Sell
Symbol()=EUR/USD
OrderOpenPrice()=1.3755 //Bid
StopLoss=0 //on the interbanking carnet system
TakeProfit=0 //on the interbanking carnet system


[2nd order1010]
Order=Buy
Symbol()=EUR/CHF
OrderOpenPrice()=1.5510 //Ask
StopLoss=0 //on the interbanking carnet system
TakeProfit=0 //on the interbanking carnet system


[3rd order1011]
Order=Buy
Symbol()=USD/CAD
OrderOpenPrice()=1.1380 //Ask
StopLoss=0 //on the interbanking carnet system
TakeProfit=0 //on the interbanking carnet system



***** I would like write EA what will control current TakeProfit and StopLoss level for each opened order.

Expert Advisor should work as I described below for above axample opened orders: *****


[1st order1009]
Order=Sell

Symbol()=EUR/USD

If Ask of EURUSD <= OrderOpenPrice(1009)-20*Point

{ Modify order1009 and set StopLoss=(Ask-Current Spread+10*Point) }

If Bid of EURUSD >= OrderOpenPrice(1009)+20*Point

{ Close order1009 }

[2nd order1010]
Order=Buy
Symbol()=EUR/CHF

If Bid of EURCHF >= OrderOpenPrice(1010)+20*Point

{ Modify order1010 and set StopLoss=(Ask+Current Spread-10*Point) }

If Ask of EURCHF <= OrderOpenPrice(1010)-20*Point

{ Close order1010 }

[3rd order1011]
Order=Buy
Symbol()=USD/CAD

If Bid of USDCAD >= OrderOpenPrice(1011)+20*Point

{ Modify order1011 and set StopLoss=(Ask+Current Spread-10*Point) }

If Ask of USDCAD <= OrderOpenPrice(1011)-20*Point

{ Close order1011 }

My questions are:

1/. What variables should I define in MQL code to be able lookup opened orders and reffer to them? In this concrete case for those three opened orders?

2/. What code should I write in MQL code for proper modyfing and close opened orders? In this concrete case, for example for [2nd order1010]?

3/. What for is Sleep(5000) function and if should I use it in modyfing opened orders?

4/. Should I set RefreshRates() function before check each condition for modyfing/closing opened orders? Is it good idea?

Please for help. Thank you in advance.

Puncher