Things to measure during a trial:
- Spreads on your main pairs at your trading times, recorded several days in a row.
- Commission per lot and how it shows in the account history.
- Execution: slippage on market orders and on stops during a fast move.
- Dashboard accuracy: does the drawdown floor update in real time?
- Platform tools: does your EA or indicator run?
A practical detail: firms often state the inactivity period in calendar days, not trading days, so a two-week holiday plus a slow week can already come close to a 30-day limit. Putting the deadline in your calendar the day you take a break is the simplest protection.
Did a free trial ever change your decision about a firm?