best forex description

Can someone give me a good description of forex that is accurate.

something short and also touch upon these topics
- volume
-margin
-market participants
-liquidity
-fundamental/technical analysis
-global market
-comparison to other markets (stocks, fixed income, etc.)
-risks

i have family members who are interested, but i can't find description that's well rounded

any broker site has it.

just teach them how to not loose money, that's more important.

i did look at some broker descriptions..but it seems they are trying to sell forex rather than inform us. I guess i am looking for more info towards risky side as well as rewards in forex trading.