You will summarize your weekly performance and explain your thoughts of what contributed to this performance (market, sector, individual, etc). You will give an assessment of what you did right or wrong. I would also recommend pointing out your outperformers and underperformers in the portfolio.
All applicants go through a series of tests that check their level of English and knowledge of formatting styles. The applicant is also required to present a sample of writing to the Evaluation Department. If you wish to find out more about the procedure, check out the whole process.