i figured out something with the different results with different brokers

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the metatrader/alpari data includes sunday pre openning data, which will effect the indicators' calculation. look at the sunday period, on the 15min and 30 min chart, there are a few extra candles. on the 4 hr chart, the candles completely messes up.
so if your ea makes money on one and not the other, go with the broker that the ea makes the money on.

ps. i wrote an ea for a 4 hr system, on the alpari feed, it made 50% in 1 year 8 months of data, on fxdd, it made 250%. what i noticed is that it takes much longer to caluclate the same script on the fxdd than the metaquotes station. would that indicate a better calculation? modeling quality on both range from 30-55%. is that bad? what does the modeling quality really mean?

and for some strange reason, the EA wont test trade before 2005 april even though the data is available on my charts.

comments appreciated thanks.