Market cap = share price * total paid up shares of the company.
What it reflects is the value perceived by the market, of the company as a whole.

maybank, for instance, has a market cap of approx 45billion, which means the market thinks maybank group is worth 45b.

there's actually alot of free information available out there, most frequently used is of course ur KLSE announcments and ur annual reports. Generally both provide decently reliable financial information. However, for market sentiments, investor opinions and research house recommendations, u'll need a bit more digging to find them

There's always been something I've been very curious about, I hope ppl here can answer me.

Whenever you see ur stock market system (in my case, M2u), you notice there's last transaction being buy/sell, correct? However, what baffles me is, isn't every buy also a sell? So how do they decide, and hwo the come up with the buy : sale ratio and the percentage%?