Function calculate_queue_imbalance

pub fn calculate_queue_imbalance(
    bids: &SmallVec<[Level; 25]>,
    asks: &SmallVec<[Level; 25]>,
) -> f64

Calculate basic queue imbalance at best bid/ask

Returns normalized imbalance (-1.0 to 1.0) where:

• Positive values indicate bid quantity dominance
• Negative values indicate ask quantity dominance