Most importantly, you need to follow money management practices and keep your Daily loss limit calculated from Start of the day equity up to 3% and your Max Loss limit calculated from starting balance up to 6%. The same rules you already know from the previous phases. You can read more about StartTrader evaluation HERE.
Another thing to keep in mind is the maximum risk on open trades. Breaking this rule does not lead to losing account, but it triggers warning or eventually Consistency rules application.
Once you reach the final phase and get your StartTrader demo account, you no longer have to meet requirements for profit target. You are not required to make any specific volume. You just need to stay active. You need to close at least one trade per month. An account that has not been traded for 30 days will be closed.