[amibroker] HELP!!! Expert Help Required! VALUES = {EMPTY} the first Time- For Me Only!???

["jorgen_wallgren" <jorgen.wallgren@xxxxxxxxx>]

I have written some code which scans a big ticker list (490 tickers), depending on 4 criteria's (Price, Volume, Liquidity and Price Range) ? those passing though will be added to a new Watchlist.
It works fine, except the first time I run the code. Because the first time, both Liquidity and Price Range shows up as {EMPTY} in a _TRACE!!! Second time it works fine.
Here is what makes it even stranger!!! A friend of mine tried the code in his AB installation and it just works fine for him!!!
I am using IQFeed and have done a complete backfill of the all the data. 

Here are the parts of the code giving problem:
It starts here:

if ( NewPeriod )
{
    ClearWatchList( TickerCategory2, TickerListNum2 );
    TickerList	= GetCategorySymbols( TickerCategory, TickerListNum );
    Updated 		= False;

    for ( i = 0; ( Ticker = StrExtract( TickerList, i ) ) != ""; i++ )
    {
        SetForeign( Ticker );
        Updated = CreateWatchList( Ticker, TickerCategory2, TickerListNum2, Updated );
        RestorePriceArrays();
    }
    AlertIf( Updated, "SOUND C:\\Program Files\\AmiBroker\\Sound Files\\newemail.wav", "Search List Updated", 0, 10 );
    RefreshWatchList();
}

Then it goes to the CreateWatchList:


function CreateWatchList( Ticker,  TickerCategory, TickerListNum, Updated )
{
    PriceCondition = LastValue( Condition1() );
    if ( PriceCondition )
    {
        VolumeCondition = LastValue( Condition2() );
        if ( VolumeCondition )
        {
            LiquidityCondition = LastValue( Condition3() );
            if ( LiquidityCondition )
            {
                _TRACE( Ticker + " Condition 3!" );
                PriceRangeCondition = LastValue( Condition4() );
                if ( PriceRangeCondition )
                {
                    _TRACE( Ticker + " Condition 4!" );
                    CategoryAddSymbol( Ticker, TickerCategory, TickerListNum );
                    Updated = True;
                }
            }
        }
    }
    return Updated;
}


And the Condition functions are:


function Condition1()
{
    Condition 	= Close  >= CloseLow AND Close <= CloseHigh ;
    return Condition;
}
function Condition2()
{
    DailyVolume 	= TimeFrameGetPrice( "Volume", inDaily, -1 );
    TodayVolume	= TimeFrameGetPrice( "Volume", inDaily );
    Condition 	= (DailyVolume >= VolumeValueMin AND DailyVolume <= VolumeValueMax)  OR TodayVolume >= VolumeValueMin;
    return Condition;
}
function Condition3()
{
    Liquidity = MA( Close * Volume, ( ( 6.5 * 3600 ) / Interval() ) * 5 );
    Condition = Liquidity >= LiquidityOK;
    return Condition;
}
function Condition4()
{
    H0 			= SelectedValue( TimeFrameGetPrice( "H", inDaily, -1 ) );
    L0 			= SelectedValue( TimeFrameGetPrice( "L", inDaily, -1 ) );
    PriceRange	= H0 - L0;
    Condition 	= PriceRange >= PriceRangeOK;
    return Condition;
}

I have traced the problem and it's in the Condition 3 and 4 Functions which returns {EMPTY} Values the first time the code runs.
Please, please any idea what can cause this problem in my AB, but not on my friends AB?  I can e-mail you the whole code if you have time to take a look?

Thanks!!!

Jorgen




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