Forward is a password in the army, which is used to direct soldiers to move forward and get close to form a queue. If you want to shout out this password, you can follow the following steps:

1. Raise the volume: Make sure that your voice can reach the ears of all soldiers.

2. Use a clear and powerful tone: the password needs to be clear so that soldiers can understand and act.

3. Command action: While shouting the password, you can cooperate with gestures or batons to help soldiers better understand and execute.

So, you can shout: "Forward!"

Note that this password is usually only used in the army, and it may cause confusion or misunderstanding if used in other occasions.