Bad tactic!!!!

[talisman]

In theory, you'd use the red arrows to encourage the player to go forward when there is clear space in front of them, providing there is nothing they need to do in their normal role, e.g. DR has to mark his nearest opponent, but if he's free, go up and support the attack.

The blue arrows would be to used to encourage the player to sit back from their primary role, e.g. MC assisting DM- or D- players, useful if your DMC is unavailable and you don't want to risk the % hit that playing an MC in the DMC position would entail.

I use the arrows on the AML/AMR in 4-5-1V, and AMC in x-1-2 formations, as it seems to make them 'shadow strikers' without the need for the SA. With DL/DR I've found it makes them ignore their primary responsibility and leave the opposition wingers free reign... and experimenting with the arrows in the new 'live view' on the Android App tends to confirm this.

I rarely use blue arrows as I think the players, if you're playing defensive mentality, cope adequately without the extra prodding.

If a manager is going to put lots of arrows on their players, I would question whether they might be better putting the players in the formation that the arrows are guiding the players to in the first place.