The break-even price is the stock price your chosen stock needs to reach by the expiry date for your trade to make exactly zero profit or loss.
If the stock closes above the break-even price at expiry (for Going Up trades), you make money. If it closes below, you lose some or all of what you paid.
The break-even price is shown on every tier card and in the contract detail view. It is the single most important number to watch during your trade.