LeaderHeads Support:
pvplevels-kills
pvplevels-deaths
pvplevels-xp
pvplevels-level
pvplevels-kdr

Holographic Displays Support:
To use /pvplevels hologram permission: pvplevels.hologram
New command /pvplevels hologram create <name> <text> permission: pvplevels.hologram.create
New command /pvplevels hologram delete <name> permission: pvplevels.hologram.delete
New command /pvplevels hologram list permission: pvplevels.hologram.list
New command /pvplevels hologram info <name> permission: pvplevels.hologram.info
In <text> you can use:
{pvplevels_player}
{pvplevels_level}
{pvplevels_xp}
{pvplevels_xp_required
{pvplevels_kills}
{pvplevels_deaths}
{pvplevels_kdr}
In <number> you can set the between 1 to infinity
{pvplevels_player_level_<number>}
{pvplevels_player_level_stats_<number>}
{pvplevels_player_xp_<number>}
{pvplevels_player_xp_stats_<number>}
{pvplevels_player_kills_<number>}
{pvplevels_player_kills_stats_<number>}
{pvplevels_player_deaths_<number>}
{pvplevels_player_deaths_stats_<number>}
{pvplevels_player_kdr_<number>}
{pvplevels_player_kdr_stats_<number>}