If you are long term trader, in my mind you don't have to visit stock BBS at all.
You only need to check daily chart, or even weekly chart. If you are FA trader, you don't need to check chart at all. Certainly you don't need to visit 白天灌水 post. Why bother with 5mins chart if you are not short term trader? Just for fun?
for example, if I DT a goog, I bot 200 share GOOG at 500 and sold it at 500 with break even.
Then I have to pay $100K * 0.25% * 2(one buy and one sell) = $500
If so , My total vol of yearly trade is way more than >100M, I need pay damn >100M *0.25% = 250Ktax?