Yes I have cold storage as well, thankfully. I WAS using these funds to trade with.
Oh. So you have a cold storage wallet then.
So the funds you lost are only your trading funds? Hopefully not that much of a percentage over your total crypto holdings. I guess what you need to learn is how to secure your exchange accounts then.
1. Use a secure password. Preferably, 40 characters with symbols and everything (e.g. zbo^nxvVQNRVSRME4vB38mkaiG5GIYJt&z7mzUFn). To make your passwords easier to organize, use a password manager such as KeePass2[1].
2. 2 Factor Authentication. NOW.
3. As much as possible, have a separate email account for your exchanges.
[1]
https://keepass.info/download.html
*snip*
You're going to waste your time tracking your funds mate. Forget it. I know it's hard, but the best thing you can really do is to move on and learn from it. Don't make this loss slow you down from accumulating.