TWII, TWSE Index(TWII) or Taiwan Capitalization Weighted   is a stock market index.  Taiwan Capitalization Weighted Index(TWII) started in  December 1966 with a base  level of 100.   TWSE(TWII) is an index made of all publicly owned  companies  (stocks), based in Taiwan.

TWII，台湾加权指数（TWII）或台湾市值加权股市指数。  台湾加权指数（TWII）1966年12月开始在100的基础水平。  台湾证券交易所（TWII）是所有公有企业（股）总部设在台湾，一个索引。

Index values are useful for investors to track changes in market values over long periods of time.

Technical analysis uses index charts to identify changes in trends whether short-term, mid-term or long-term time frames.