use finance_solution::stocks::ta::{sar_solution, SarParams};
let n = 30usize;
let h: Vec<_> = (0..n).map(|i| 101.0 + i as f64 * 0.1).collect();
let l: Vec<_> = (0..n).map(|i| 99.0 + i as f64 * 0.1).collect();
let c: Vec<_> = (0..n).map(|i| 100.0 + i as f64 * 0.1).collect();
let sol = sar_solution(&h, &l, &c, SarParams::standard()).unwrap();
assert!(sol.formula().contains("0.02"));