Why demo performance is often better than live performance?

[Trader_Rob]

But some most of people while trading in demo, they never serious to use demo account for learning. And then in real trade, they do not have enough emotion management and make their real trade going worse.

I agree with this. When using a demo account, we are often careless knowing that we have nothing to lose no matter the outcome. That is why when we switch to a real account, we become more nervous and often do not know how to handle our emotions.