移动平均收敛/发散（MACD）

use macd_rs::MACD;
use ta_common::traits::Indicator;

let mut macd = MACD::new(2, 5, 9);
assert_eq!(macd.next(81.59), None);
assert_eq!(macd.next(81.06), None);
assert_eq!(macd.next(82.87), None);
assert_eq!(macd.next(83.00), None);
assert_eq!(macd.next(83.61), Some([0.6177777777777749, 0.6177777777777749, 0.00]));
assert_eq!(macd.next(83.15), Some([0.3512757201646082, 0.5644773662551416, -0.21320164609053338]));
assert_eq!(macd.next(82.84), Some([0.11065843621399551, 0.4737135802469124, -0.3630551440329169]));
assert_eq!(macd.next(83.99), Some([0.41593049839961793, 0.46215696387745353, -0.0462264654778356]));
assert_eq!(macd.next(84.55), Some([0.5780064014631705, 0.48532685139459697, 0.09267955006857354]));
assert_eq!(macd.next(84.36), Some([0.4222440684854689, 0.4727102948127714, -0.050466226327302466]));
assert_eq!(macd.next(85.53), Some([0.6837982014936586, 0.5149278761489489, 0.1688703253447097]));
assert_eq!(macd.next(86.54), Some([0.9266328529413386, 0.5972688715074268, 0.32936398143391177]));
assert_eq!(macd.next(86.89), Some([0.8913443637205063, 0.6560839699500427, 0.2352603937704636]));
assert_eq!(macd.next(87.77), Some([0.9787592852891009, 0.7206190330178543, 0.2581402522712466]));
assert_eq!(macd.next(87.29), Some([0.6206827600178713, 0.7006317784178577, -0.07994901839998647]));