Straight flush is undoubtedly the best choice for free viewing. In addition to the traditional A-share and B-share markets, Straight Flush also provides quotations and technical analysis of Hong Kong stocks, foreign exchange and mainland futures. Straight flush is unique in dealing with the Hong Kong stock market. When you need to enter a code to look at Hong Kong stocks, you just need to add the prefix of HK before the code to get the choice directly, and you don't need to choose from multiple candidate stocks, especially when comparing the stock prices of A shares and H shares, avoiding the mistake of looking at H shares but treating them as A shares.