Alexis Sanchez and Dimitri Payet among best Fantasy Football picks ahead of Arsenal vs Everton and West Ham vs Chelsea

We reveal the players you should bring in to your side ahead of the weekend

Alexis Sanchez

Form is a key element for picking the right players at the right time in your fantasy football team.

The best fantasy football managers use a simple formula to calculate a player's form. PPG6 (Points per game in their last 6 games). A player's total fantasy football points from their last six games, divided by six.

Many players will experience a purple patch during the season, and even the best players suffer a dip in form at times. The trick is to anticipate these transitions and act accordingly.

The Independent has teamed up with fantasy football game www.oulala.com who have arguably the most sophisticated scoring system in fantasy football today. Heavily based around stats over 70 criteria, it's a great source when calculating a player's true form.

Oulala have crunched the numbers and have revealed the most in-form players, in each position, in the Premier League. The players who simply must be in your fantasy football side right now.

Interestingly, Arsenal players claim three of the four spots. Check them out below...

This weekend's fixtures...

Saturday: Aston Villa v Swansea 15:00, Leicester v Crystal Palace 15:00, Norwich v West Brom 15:00, Stoke v Watford 15:00, West Ham v Chelsea 15:00, Arsenal v Everton 17:30; Sunday: Sunderland v Newcastle 12:00, Bournemouth v Tottenham 14:05, Liverpool v Southampton 16:15

Find out more about Oulala on Twitter @OulalaGames