There are two ways to access your trade history. The first way is to go to your wallet page (https://hollaex.com/wallet) and click the top right "History" (https://hollaex.com/transactions) you will be taken to a tab called "Trade".
The second way to access your trade history is through your trade page. Every trade page will have your 'recent trades' at the bottom of the page. The in corner of that panel you can click the 'Transaction History'
Within your trade history page, you can download the full history of your trade for use outside of HollaEx.com.