Sort:  

No, anyone can see the code. It only gets information from coinmarketcap.com.
But it's possible to log your portfolio technically from a script. People with knowledge of little programming should be able to find out and report it.

Coin Marketplace

STEEM 0.06
TRX 0.30
JST 0.059
BTC 69981.79
ETH 2161.06
USDT 1.00
SBD 0.53