What's Changed
* refactor: backtest by linsamtw in https://github.com/FinMind/FinMind/pull/274
* feat: rm typing.Dict on add_indicators, add_buy_rule, add_sell_rule by linsamtw in https://github.com/FinMind/FinMind/pull/276
* feat: add KdCrossOver, MAGoldenDeathCrossOver, InstitutionalInvestorsOverBuy, ShortSaleMarginPurchaseRatio by linsamtw in https://github.com/FinMind/FinMind/pull/277
**Full Changelog**: https://github.com/FinMind/FinMind/compare/1.6.3...1.6.4