getting symbol information for external symbol in backtesting

[chinaski]

Hi,

SymbolInfoDouble, GetSymbolInfoTick, all those functions are answered with error 4106

in testing mode. Symbol unkown or not selected. SelectSymbol fails because of backtest mode.

In my expert i use multiple symbols and need bid and ask of extern symbols also in backtest.

How to achieve this ?

Thank you

[Carl Schreiber]

The terminal must be connected with the server (acct. login) and the symboly must appear in the Market Watch.

With the function SymbolSelect() you can (de) select the symbols.

But in mt4 you test only with ONE symbol per run!

[William Roeder]

Carl Schreiber: But in mt4 you test only with ONE symbol per run!

This is why I recommend Do not trade multiple currencies in one EA You can't use any predefined variables, can't use the tester, must poll (not OnTick,) and usually other problems, e.g A problem with iBarShift - MQL4 and MetaTrader 4 - MQL4 programming forum - Page 2 Code it to trade the chart pair only. Look at the others if you must. (Don't assume that Time[i] == iTime(otherPair,tf, i) always use iBarShift.) Then put it on other charts to trade the other pairs. Done.

[chinaski]

Thank you for answers.

Due to this limits, it seems to implement a portfolio strategy is pretty difficult. Would you agree ?

[Alain Verleyen]

chinaski:

Thank you for answers.

Due to this limits, it seems to implement a portfolio strategy is pretty difficult. Would you agree ?

That's why God created MT5 :-D