Why does the base do this when you:


buy 0.1 ETH/USD @ 570

sell 0.4 @ 617.87

sell 0.5 @ 632.32

position amount: 0.01, base price: 371.96



What am i missing? why does the base price change?

I am using bitfinex.com

Let's say i want to buy 10 PAY tokens (Tenx). What do you consider, before using BTC, ETH or LTC and so on?