Urgent update — Stock:Retail investors Steam update #482364

I have added impulse trading to single-day trading, simulating the power to influence market trends. Now, the single-day trends are more difficult to predict and wilder. Additionally, I have updated the mail feature, removing the original function and adding a feature to preview clearing stocks. I must admit that this part is a semi-finished product, because my original plan was to complete this part first, then modify the single-day trading. However, today many players have provided feedback that single-day trading is disappointing, so I prioritized resolving the single-day trading issue. As a result, the original function of the mail feature has been removed and only a semi-finished product has been released. Nonetheless, it is only one step away from completion and will be finished soon. Since the new feature is relatively urgent, please let me know if there are any problems.