Futures Options Margin What Is The Best Online Future-options Trading Website?

What is the best online future-options trading website? - futures options margin

I AvaTrader, but I do not understand.
I have a demo-account balance was $ 100,000.
It is now 99,800.00
1) The equilty is 75,000,00
Magin used 2) 69000000
Margin of 3) is 6.600.00
4) PL -24,000,000 Net is what PL?

I do not know the four words, please help.

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and testing AvaTrader.

Click CFD: Review of Gold
states - to 951 Sell: 20
- Acquisition of 951, 90
What does this mean? / Purchase of differential pricing is 70?

Please explain.