Login to your 000webhost.com account
Hit Settings then Security on the menu
Browse down to "Manage Hotlink Protection"
Click on add and fill in the box with the page the user should be taken to if found to be hotlinking
In my case I've created a .html page with the content saying please do not hotlink
So now if anyone was to stumble onto my website and say for instance steal an image on my main site called foamlance.jpg if they hotlink to it then it should not allow them to without displaying my image or redirecting them completely.
The only way this image should display is while being loaded on a page on my site or being accessed directly possibly.
Hope you can enjoy the benefits of this to protect your bandwidth