Usability suggestion here.
When you tap a particular transaction, you get the data associated with the transaction itself. How much you paid, the fee, which card you used, and some supplementary statistics that detail how much you spent with this particular merchant this month.
It would be great if the user could tap the icon of the merchant, and then have it shift towards the list of all transactions conducted with the merchant (Accessible via the Chart Icon → Merchant → Individual Merchants.).