pub fn vwap(
high: &[f64],
low: &[f64],
close: &[f64],
volume: &[f64],
params: VwapParams,
) -> FinanceResult<VwapSeries>pub fn vwap(
high: &[f64],
low: &[f64],
close: &[f64],
volume: &[f64],
params: VwapParams,
) -> FinanceResult<VwapSeries>