mfi

// Money Flow Index (value is the EMA(avg_len) of the raw MFI; avg_len = 1 gives the raw line)
// Defaults of "mfi" (see the indicator reference)
let params = HashMap::from([
    ("avg_len".to_string(), 3.0),
    ("mfi_len".to_string(), 14.0),
    ("overbought".to_string(), 80.0),
    ("oversold".to_string(), 20.0),
]);
let mut indicator = build_checked("mfi", &params)?;

for bar in &bars {
    if let Some(output) = indicator.on_bar(bar) {
        // output.value, output.extra[...], indicator.alerts()
    }
}