diff --git a/bot.go b/bot.go
index 8a75300..17cede4 100644
--- a/bot.go
+++ b/bot.go
@@ -649,6 +649,19 @@ func botGStock(m *tb.Message) {
 		return
 	}
 
+	clt, err := getLockedIdleClient()
+	if err != nil {
+		c := TGCommand{
+			Type:         commandReplyMsg,
+			Text:         "Busy, please retry later.",
+			FromMsgID64:  int64(m.ID),
+			FromChatID64: m.Chat.ID,
+		}
+		TGCmdQueue <- c
+	}
+	userID64 := clt.TGUserID64
+	clt.Mux.Unlock()
+
 	p := JobPayloadGStock{
 		MsgID64:  int64(m.ID),
 		ChatID64: m.Chat.ID,
@@ -656,7 +669,7 @@ func botGStock(m *tb.Message) {
 	}
 	b, _ := json.Marshal(p)
 	t := time.Now().UTC().Add(1 * time.Second)
-	_, err := createJob(objSubTypeJobGStock, objJobPriority, cfg.Bot.Admin, 0, t, b)
+	_, err := createJob(objSubTypeJobGStock, objJobPriority, userID64, 0, t, b)
 
 	if err != nil {
 		c := TGCommand{
diff --git a/client.go b/client.go
index 6e05313..a56048b 100644
--- a/client.go
+++ b/client.go
@@ -7,6 +7,57 @@ import (
 	"time"
 )
 
+func setClientBusy(userID64 int64, from time.Time, duration time.Duration) error {
+	if from.UTC().Add(duration).After(time.Now().UTC()) {
+		if clt, ok := getLockedClient(m.Chat.ID, false); ok {
+			clt.CWIdle = false
+			clt.CWBusyUntil = from.UTC().Add(duration)
+			clt.Mux.Unlock()
+			return nil
+		} else {
+			return errors.New("Client not found.")
+		}
+	}
+	return nil
+}
+
+func setClientIdle(userID64 int64, from time.Time) error {
+	if clt, ok := getLockedClient(m.Chat.ID, false); ok {
+		if from.UTC().After(clt.CWLastUpdate.UTC()) {
+			clt.CWBusyUntil = from
+			clt.CWIdle = true
+			clt.CWLastUpdate = from
+		}
+		clt.Mux.Unlock()
+		return nil
+	} else {
+		return errors.New("Client not found.")
+	}
+}
+
+func getLockedIdleClient() (*ChirpClient, error) {
+	muxClients.RLock()
+	ids := make([]int64, 0)
+	for id, c := range clients {
+		if c.CWIdle {
+			ids := append(ids, c.TGUserID64)
+		}
+	}
+	muxClients.RUnlock()
+	if len(ids) == 0 {
+		return nil, errors.New("No idle client.")
+	}
+
+	RndMux.Lock()
+	id := RndSrc.Intn(len(ids))
+	RndMux.Unlock()
+
+	clients[ids[id]].Mux.Lock()
+
+	return clients[ids[id]], nil
+
+}
+
 func getLockedClient(id int64, createMissing bool) (*ChirpClient, bool) {
 	muxClients.RLock()
 	if c, ok := clients[id]; ok {
diff --git a/def.go b/def.go
index 5c0fee7..900d1e4 100644
--- a/def.go
+++ b/def.go
@@ -40,6 +40,7 @@ type ChirpClient struct {
 	CWState      string    `json:"state"`
 	CWBusyUntil  time.Time `json:"busy_until"`
 	CWLastUpdate time.Time `json:"last_update"`
+	CWIdle       bool      `json:"idle"`
 	Mux          sync.Mutex
 }
 
diff --git a/job.go b/job.go
index 78706f3..9d0f32f 100644
--- a/job.go
+++ b/job.go
@@ -135,7 +135,7 @@ func setJobStart(jobId int64) error {
 }
 
 func rescheduleJob(jobID64 int64, trigger int64, schedule time.Time) error {
-	stmt, err := db.Prepare(`UPDATE obj_job j SET j.is_done = 0, j.in_work = 0, j.schedule = ?, j.trigger_id = ? WHERE j.obj_id = ?;`)
+	stmt, err := db.Prepare(`UPDATE obj_job j SET j.in_work = 0, j.schedule = ?, j.trigger_id = ? WHERE j.obj_id = ?;`)
 	logOnError(err, "rescheduleJob : prepare update obj_job")
 	if err != nil {
 		return err