Viewing the history of Buys and Sells for a stock can be helpful. On the History screen (for the stock), I feel the price purchased at is more valuable than how many shares.
Could you rethink the history screen for the stock?
Something like
B(or icon for buy) @ ££££ / xxx (shares)
S (or icon for sold) @ ££££ / xxx (shares)
Currently it only shows just the shares in sometimes partial fills which is not useful.
This prevents users from having go into the transactions to see the previous prices they have purchased a stock at.