When you have reached your trade limit, an error message appears when trying to upload more trades.
The current limits are:
200 for free users
3500 for PRO members
These limits are totals, not annual limits.
Sometimes you can reduce your trades by combining trades, however this will affect the time stamp and thus the average price and the correct gains calculation.
To increase your trade limit go to Account Upgrade and view the membership choices that offer more trades.