need help on simple NormalizeDouble() problem

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double bidask_Ave0, bidask_Ave1;
double change;
double bid, ask;

bid = NormalizeDouble(Bid,5);
ask = NormalizeDouble(Ask,5);

bidask_Ave0 = (bid+ask)/2;
change = bidask_Ave0-bidask_Ave1;
bidask_Ave1 = bidask_Ave0;

Print(change);

im reciveing huge numbers:

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Print(DoubleToStr(change,5));