diff --git a/modules/common/src/main/mon.scala b/modules/common/src/main/mon.scala
index cf394d2f09..be8fcfc87a 100644
--- a/modules/common/src/main/mon.scala
+++ b/modules/common/src/main/mon.scala
@@ -62,6 +62,7 @@ object mon {
       def acceptedRatedClock(clock: String) =
         inc(s"lobby.hook.a_r_clock.${clock.replace("+", "_")}")
       def joinMobile(isMobile: Boolean) = inc(s"lobby.hook.join_mobile.$isMobile")
+      def likePoolFiveO(isMobile: Boolean) = inc(s"lobby.hook.like_pool_5_0.$isMobile")
     }
     object seek {
       val create = inc("lobby.seek.create")
diff --git a/modules/lobby/src/main/Hook.scala b/modules/lobby/src/main/Hook.scala
index ab6b3c3a75..65ecda4046 100644
--- a/modules/lobby/src/main/Hook.scala
+++ b/modules/lobby/src/main/Hook.scala
@@ -6,10 +6,10 @@ import ornicar.scalalib.Random
 import play.api.libs.json._
 
 import actorApi.LobbyUser
+import lila.common.PimpedJson._
 import lila.game.PerfPicker
 import lila.rating.RatingRange
 import lila.user.{ User, Perfs }
-import lila.common.PimpedJson._
 
 // realtime chess, volatile
 case class Hook(
@@ -70,6 +70,9 @@ case class Hook(
 
   lazy val perfType = PerfPicker.perfType(speed, realVariant, none)
 
+  def likePoolFiveO =
+    realMode.rated && realVariant.standard && color == "random" && clock.show == "5+0"
+
   private lazy val speed = Speed(clock.some)
 }
 
diff --git a/modules/lobby/src/main/Socket.scala b/modules/lobby/src/main/Socket.scala
index 11cb787f6d..5daa88d973 100644
--- a/modules/lobby/src/main/Socket.scala
+++ b/modules/lobby/src/main/Socket.scala
@@ -72,6 +72,9 @@ private[lobby] final class Socket(
           if (hook.uid == member.uid || Biter.canJoin(hook, member.user)) member push msg
         }
       }
+      if (hook.likePoolFiveO) withMember(hook.uid) { member =>
+        lila.mon.lobby.hook.likePoolFiveO(member.mobile)()
+      }
     }
 
     case AddSeek(_) => notifySeeks