Charlton boss Chris Powell feels his side could need more than 50 points to guarantee their Championship surival this season.
The Addicks are currently on 43 points, eight clear of the relegation zone, ahead of Saturday's home game against Burnley.
"Everyone talks about 50 points but I think it will be a bit more this year because of the nature of the league," said Powell.
"It's very tight and the players know what they need to do over our last 12 games.
"Just look at the week Leicester have had. They lost to us, drew away at Blackpool and beat Blackburn, who have been on a terrific run.
"It's just up and down for everyone and it can be tough for supporters as well as players.
"You feel 'my team is in a good place' and then you don't win for five or six games and everyone asks 'what's going on?' Then you can win again. It's very up and down."
The Bees gave their survival hopes a huge boost on Tuesday as goals from Jake Hyde and player-boss Edgar Davids secured a valuable three points.
Byrne said: "It was a very scrappy game but we dug in and got the three points which is exactly what we wanted.
"We have played well recently but against Southend we also showed that we can win ugly when we have to.
"Earlier on in the season we would not have come away from that kind game with a win but now we are grinding out results.
"That has allowed us to progress up the table and the more points we pick up, the more teams get dragged into trouble.
"We have to take each game as it comes so right now we are focused on what is a massive game on Saturday against Plymouth Argyle.
"Hopefully we can build on a good win and get another three points."
