STOCK SYSTEM HAS BEEN UPDATED 2019-07-30
you can check 'Stock' place in your market page.
first, you need to check stock price by pressing 'UPDATE price' icon.
well actually it will update frequency even if you dont press it. just for make sure
'BUY 1 stock' buy current world's '1 stock' with the noticed stock price
'SALE 1 stock ' sale current world's '1 stock' with the noticed stock price (10% pay for TAX)
stock price and owned stock are all different each world
stock price changing is depends on
market buying,saling, stock buying, saling, stock price level, random value.