diff --git a/src/messenger/webim/default.css b/src/messenger/webim/default.css
index 6982313b..c1d5b5ea 100644
--- a/src/messenger/webim/default.css
+++ b/src/messenger/webim/default.css
@@ -1,5 +1,6 @@
 /*
  * Copyright 2005-2013 Evgeny Gryaznov
+ * Copyright 2013 Simushev Dmitriy
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -484,9 +485,9 @@ table.list, table.translate, table.statistics {
 }
 
 table.list th, table.translate th, table.statistics th {
-	font-size: 1.2em;
+	font-size: 1em;
 	font-weight: normal;
-	padding: 10px 8px;
+	padding: 10px 6px;
 	border-bottom: 2px solid #2F7598;
 }
 
diff --git a/src/messenger/webim/install/dbinfo.php b/src/messenger/webim/install/dbinfo.php
index f1e38851..e92f18b5 100644
--- a/src/messenger/webim/install/dbinfo.php
+++ b/src/messenger/webim/install/dbinfo.php
@@ -62,6 +62,11 @@ $dbtables = array(
 		"statid" => "int NOT NULL auto_increment PRIMARY KEY",
 		"date" => "int NOT NULL DEFAULT 0",
 		"threads" => "int NOT NULL DEFAULT 0",
+		"missedthreads" => "int NOT NULL DEFAULT 0",
+		"sentinvitations" => "int NOT NULL DEFAULT 0",
+		"acceptedinvitations" => "int NOT NULL DEFAULT 0",
+		"rejectedinvitations" => "int NOT NULL DEFAULT 0",
+		"ignoredinvitations" => "int NOT NULL DEFAULT 0",
 		"operatormessages" => "int NOT NULL DEFAULT 0",
 		"usermessages" => "int NOT NULL DEFAULT 0",
 		"averagewaitingtime" => "FLOAT(10, 1) NOT NULL DEFAULT 0",
@@ -232,7 +237,7 @@ $memtables = array();
 
 $dbtables_can_update = array(
 	"${mysqlprefix}chatthread" => array("agentId", "userTyping", "agentTyping", "messageCount", "nextagent", "shownmessageid", "userid", "userAgent", "groupid", "dtmchatstarted", "invitationstate"),
-	"${mysqlprefix}chatthreadstatistics" => array(),
+	"${mysqlprefix}chatthreadstatistics" => array("missedthreads", "sentinvitations", "acceptedinvitations", "rejectedinvitations", "ignoredinvitations"),
 	"${mysqlprefix}requestbuffer" => array("requestid", "requestkey", "request"),
 	"${mysqlprefix}chatmessage" => array("agentId"),
 	"${mysqlprefix}indexedchatmessage" => array(),
diff --git a/src/messenger/webim/install/dbperform.php b/src/messenger/webim/install/dbperform.php
index 3831d667..3e3f933b 100644
--- a/src/messenger/webim/install/dbperform.php
+++ b/src/messenger/webim/install/dbperform.php
@@ -132,6 +132,26 @@ if ($act == "silentcreateall") {
 			runsql("ALTER TABLE ${mysqlprefix}chatthread ADD invitationstate int NOT NULL DEFAULT 0 AFTER istate", $link);
 		}
 
+		if (in_array("${mysqlprefix}chatthreadstatistics.missedthreads", $absent_columns)) {
+			runsql("ALTER TABLE ${mysqlprefix}chatthreadstatistics ADD missedthreads int NOT NULL DEFAULT 0 AFTER threads", $link);
+		}
+
+		if (in_array("${mysqlprefix}chatthreadstatistics.sentinvitations", $absent_columns)) {
+			runsql("ALTER TABLE ${mysqlprefix}chatthreadstatistics ADD sentinvitations int NOT NULL DEFAULT 0 AFTER missedthreads", $link);
+		}
+
+		if (in_array("${mysqlprefix}chatthreadstatistics.acceptedinvitations", $absent_columns)) {
+			runsql("ALTER TABLE ${mysqlprefix}chatthreadstatistics ADD acceptedinvitations int NOT NULL DEFAULT 0 AFTER sentinvitations", $link);
+		}
+
+		if (in_array("${mysqlprefix}chatthreadstatistics.rejectedinvitations", $absent_columns)) {
+			runsql("ALTER TABLE ${mysqlprefix}chatthreadstatistics ADD rejectedinvitations int NOT NULL DEFAULT 0 AFTER acceptedinvitations", $link);
+		}
+
+		if (in_array("${mysqlprefix}chatthreadstatistics.ignoredinvitations", $absent_columns)) {
+			runsql("ALTER TABLE ${mysqlprefix}chatthreadstatistics ADD ignoredinvitations int NOT NULL DEFAULT 0 AFTER rejectedinvitations", $link);
+		}
+
 		if (in_array("${mysqlprefix}chatoperator.iperm", $absent_columns)) {
 			runsql("ALTER TABLE ${mysqlprefix}chatoperator ADD iperm int DEFAULT 65535", $link);
 		}
diff --git a/src/messenger/webim/libs/statistics.php b/src/messenger/webim/libs/statistics.php
index ed225fd3..75e8f18d 100644
--- a/src/messenger/webim/libs/statistics.php
+++ b/src/messenger/webim/libs/statistics.php
@@ -62,45 +62,172 @@ function calculate_thread_statistics() {
 		$today = floor(time() / (24*60*60)) * 24*60*60;
 
 		// Calculate statistics
-		$db->query(
-			"INSERT INTO {chatthreadstatistics} ( " .
-				"date, threads, operatormessages, usermessages, " .
-				"averagewaitingtime, averagechattime " .
-			") SELECT (FLOOR(t.dtmcreated / (24*60*60)) * 24*60*60) AS date, " .
-				"COUNT(distinct t.threadid) AS threads, " .
-				"SUM(m.ikind = :kind_agent) AS operators, " .
-				"SUM(m.ikind = :kind_user) AS users, " .
-				"ROUND(AVG(t.dtmchatstarted-t.dtmcreated),1) as avgwaitingtime, " .
+		// Get base threads info
+		$db_results = $db->query(
+			"SELECT (FLOOR(t.dtmcreated / (24*60*60)) * 24*60*60) AS date, " .
+				"COUNT(t.threadid) AS threads, " .
+				"tmp.operator_msgs AS operator_msgs, " .
+				"tmp.user_msgs AS user_msgs, " .
 				// Prevent negative values of avgchattime field.
 				// If avgchattime < 0 it becomes to zero.
 				// For random value 'a' result of expression ((abs(a) + a) / 2)
 				// equals to 'a' if 'a' more than zero
 				// and equals to zero otherwise
 				"ROUND(AVG( " .
-					"ABS(tmp.lastmsgtime-t.dtmchatstarted) + " .
-					"(tmp.lastmsgtime-t.dtmchatstarted) " .
-				")/2,1) as avgchattime " .
-			"FROM {indexedchatmessage} m, " .
-				"{chatthread} t, " .
-				"(SELECT i.threadid, MAX(i.dtmcreated) AS lastmsgtime " .
-					"FROM {indexedchatmessage} i " .
-					"WHERE (ikind = :kind_user OR ikind = :kind_agent) " .
-					"GROUP BY i.threadid) tmp " .
-			"WHERE m.threadid = t.threadid " .
-				"AND tmp.threadid = t.threadid " .
-				"AND t.dtmchatstarted <> 0 " .
-				"AND (m.dtmcreated - :start) > 24*60*60 " .
+					"ABS(tmp.last_msg_time - t.dtmchatstarted) + " .
+					"(tmp.last_msg_time - t.dtmchatstarted) " .
+				")/2,1) as avg_chat_time " .
+			"FROM {chatthread} t, " .
+				"(SELECT SUM(m.ikind = :kind_agent) AS operator_msgs, " .
+					"SUM(m.ikind = :kind_user) AS user_msgs, " .
+					"MAX(m.dtmcreated) as last_msg_time, " .
+					"threadid " .
+				"FROM {indexedchatmessage} m " .
+				// Calculate only users' and operators' messages
+				"WHERE m.ikind = :kind_user " .
+					"OR m.ikind = :kind_agent " .
+				"GROUP BY m.threadid) tmp " .
+			"WHERE t.threadid = tmp.threadid " .
+				"AND (t.dtmcreated - :start) > 24*60*60 " .
 				// Calculate statistics only for threads that older than one day
-				"AND (:today - m.dtmcreated) > 24*60*60 " .
-			"GROUP BY date " .
-			"ORDER BY date",
+				"AND (:today - t.dtmcreated) > 24*60*60 " .
+				// Ignore threads when operator does not start chat
+				"AND t.dtmchatstarted <> 0 " .
+				// Ignore not accepted invitations
+				"AND (t.invitationstate = :not_invited " .
+					"OR t.invitationstate = :invitation_accepted) " .
+			"GROUP BY date",
 			array(
-				':kind_agent' => Thread::KIND_AGENT,
-				':kind_user' => Thread::KIND_USER,
 				':start' => $start,
-				':today' => $today
-			)
+				':today' => $today,
+				':not_invited' => Thread::INVITATION_NOT_INVITED,
+				':invitation_accepted' => Thread::INVITATION_ACCEPTED,
+				':kind_agent' => Thread::KIND_AGENT,
+				':kind_user' => Thread::KIND_USER
+			),
+			array('return_rows' => Database::RETURN_ALL_ROWS)
 		);
+
+		// Store statistics data
+		$statistics = extend_statistics_info(array(), $db_results);
+
+		// Get info about missed threads
+		$db_results = $db->query(
+			"SELECT (FLOOR(dtmcreated / (24*60*60)) * 24*60*60) AS date, " .
+				"COUNT(*) as missed_threads " .
+			"FROM {chatthread} " .
+			"WHERE (dtmcreated - :start) > 24*60*60 " .
+				// Calculate statistics only for threads that older than one day
+				"AND (:today - dtmcreated) > 24*60*60 " .
+				// Ignore threads when operator does not start chat
+				"AND dtmchatstarted = 0 " .
+				// Ignore not accepted invitations
+				"AND invitationstate = :not_invited " .
+			"GROUP BY date ORDER BY date DESC",
+			array(
+				':start' => $start,
+				':today' => $today,
+				':not_invited' => Thread::INVITATION_NOT_INVITED
+			),
+			array('return_rows' => Database::RETURN_ALL_ROWS)
+		);
+
+		// Add average waiting time to statistics data
+		$statistics = extend_statistics_info($statistics, $db_results);
+
+		// Get info about average chat time and missed threads count.
+		$db_results = $db->query(
+			"SELECT (FLOOR(dtmcreated / (24*60*60)) * 24*60*60) AS date, " .
+				"ROUND(AVG(dtmchatstarted-dtmcreated),1) AS avg_waiting_time,
+				SUM(dtmchatstarted = 0) AS missed_threads " .
+			"FROM {chatthread} " .
+			"WHERE (dtmcreated - :start) > 24*60*60 " .
+				// Calculate statistics only for threads that older than one day
+				"AND (:today - dtmcreated) > 24*60*60 " .
+				// Ignore threads when operator does not start chat
+				"AND dtmchatstarted <> 0 " .
+				// Ignore all invitations
+				"AND invitationstate = :not_invited " .
+			"GROUP BY date",
+			array(
+				':start' => $start,
+				':today' => $today,
+				':not_invited' => Thread::INVITATION_NOT_INVITED
+			),
+			array('return_rows' => Database::RETURN_ALL_ROWS)
+		);
+
+		// Add average waiting time to statistics data
+		$statistics = extend_statistics_info($statistics, $db_results);
+
+		// Get invitation info
+		$db_results = $db->query(
+			"SELECT (FLOOR(dtmcreated / (24*60*60)) * 24*60*60) AS date, " .
+				"COUNT(*) AS invitation_sent, " .
+				"SUM(invitationstate = :invitation_accepted) AS invitation_accepted, " .
+				"SUM(invitationstate = :invitation_rejected) AS invitation_rejected, " .
+				"SUM(invitationstate = :invitation_ignored) AS invitation_ignored " .
+			"FROM {chatthread} " .
+			"WHERE (dtmcreated - :start) > 24*60*60 " .
+				// Calculate statistics only for threads that older than one day
+				"AND (:today - dtmcreated) > 24*60*60 " .
+				"AND (invitationstate = :invitation_accepted " .
+					"OR invitationstate = :invitation_rejected " .
+					"OR invitationstate = :invitation_ignored) " .
+			"GROUP BY date",
+			array(
+				':start' => $start,
+				':today' => $today,
+				':invitation_accepted' => Thread::INVITATION_ACCEPTED,
+				':invitation_rejected' => Thread::INVITATION_REJECTED,
+				':invitation_ignored' => Thread::INVITATION_IGNORED
+			),
+			array('return_rows' => Database::RETURN_ALL_ROWS)
+		);
+
+		// Add invitation info to statistics data
+		$statistics = extend_statistics_info($statistics, $db_results);
+
+		// Sort statistics by date before save it in the database
+		ksort($statistics);
+
+		foreach($statistics as $row) {
+			// Add default values
+			$row += array(
+				'threads' => 0,
+				'missed_threads' => 0,
+				'operator_msgs' => 0,
+				'user_msgs' => 0,
+				'avg_chat_time' => 0,
+				'avg_waiting_time' => 0,
+				'invitation_sent' => 0,
+				'invitation_accepted' => 0,
+				'invitation_rejected' => 0,
+				'invitation_ignored' => 0
+			);
+
+			// Prepare data for insert
+			$insert_data = array();
+			foreach($row as $field_name => $field_value) {
+				$insert_data[':' . $field_name] = $field_value;
+			}
+
+			// Store data in database
+			$db->query(
+				"INSERT INTO {chatthreadstatistics} (" .
+					"date, threads, missedthreads, sentinvitations, " .
+					"acceptedinvitations, rejectedinvitations, " .
+					"ignoredinvitations, operatormessages, usermessages, " .
+					"averagewaitingtime, averagechattime " .
+				") VALUES (" .
+					":date, :threads, :missed_threads, :invitation_sent, " .
+					":invitation_accepted, :invitation_rejected, " .
+					":invitation_ignored, :operator_msgs, :user_msgs, " .
+					":avg_waiting_time, :avg_chat_time " .
+				")",
+				$insert_data
+			);
+		}
 	} catch(Exception $e) {
 		// Something went wrong: warn and rollback transaction.
 		trigger_error(
@@ -263,4 +390,24 @@ function calculate_page_statistics() {
 	$db->throwExeptions($db_throw_exceptions);
 }
 
+/**
+ * Add info from $additional_info to $stat_info using value of 'date' item as
+ * a key.
+ *
+ * @param array $stat_info Statistics info
+ * @param array $additional_info Data that must be added to statistics info
+ * @return array Extended statistics info
+ */
+function extend_statistics_info($stat_info, $additional_info) {
+	$result = $stat_info;
+	foreach($additional_info as $row) {
+		$date = $row['date'];
+		if (empty($result[$date])) {
+			$result[$date] = array();
+		}
+		$result[$date] += $row;
+	}
+	return $result;
+}
+
 ?>
\ No newline at end of file
diff --git a/src/messenger/webim/locales/en/properties b/src/messenger/webim/locales/en/properties
index 996781f7..0012df46 100644
--- a/src/messenger/webim/locales/en/properties
+++ b/src/messenger/webim/locales/en/properties
@@ -452,6 +452,11 @@ report.bydate.3=Messages from operators
 report.bydate.4=Messages from visitors
 report.bydate.5=Average waiting time (in seconds)
 report.bydate.6=Average chat time (in seconds)
+report.bydate.7=Missed threads
+report.bydate.8=Invitations sent
+report.bydate.9=Invitations accepted
+report.bydate.10=Invitations rejected
+report.bydate.11=Invitations ignored
 report.bydate.title=Usage statistics for each date
 report.byoperator.1=Operator
 report.byoperator.2=Chat Threads
diff --git a/src/messenger/webim/locales/ru/properties b/src/messenger/webim/locales/ru/properties
index 789ccd49..ad50eb1b 100644
--- a/src/messenger/webim/locales/ru/properties
+++ b/src/messenger/webim/locales/ru/properties
@@ -451,6 +451,11 @@ report.bydate.3=
 report.bydate.4=Сообщений посетителей
 report.bydate.5=Среднее время ожидания (в секундах)
 report.bydate.6=Среднее время диалога (в секундах)
+report.bydate.7=Диалогов пропущено
+report.bydate.8=Приглашений отправлено
+report.bydate.9=Приглашений принято
+report.bydate.10=Приглашений отклонено
+report.bydate.11=Приглашений проигнорировано
 report.bydate.title=Использование мессенджера по дням
 report.byoperator.1=Оператор
 report.byoperator.2=Диалогов
diff --git a/src/messenger/webim/operator/statistics.php b/src/messenger/webim/operator/statistics.php
index fead6be9..873cd16d 100644
--- a/src/messenger/webim/operator/statistics.php
+++ b/src/messenger/webim/operator/statistics.php
@@ -40,6 +40,8 @@ $page['showbypage'] = ($statisticstype == 'bypage');
 $page['cron_path'] = cron_get_uri(Settings::get('cron_key'));
 $page['last_cron_run'] = Settings::get('_last_cron_run');
 
+$page['show_invitations_info'] = (bool)Settings::get('enabletracking');
+
 $errors = array();
 
 if (isset($_GET['startday'])) {
@@ -81,6 +83,11 @@ if ($statisticstype == 'bydate') {
 	$page['reportByDate'] = $db->query(
 		"SELECT DATE(FROM_UNIXTIME(date)) AS date, " .
 			"threads, " .
+			"missedthreads, " .
+			"sentinvitations, " .
+			"acceptedinvitations, " .
+			"rejectedinvitations, " .
+			"ignoredinvitations, " .
 			"operatormessages AS agents, " .
 			"usermessages AS users, " .
 			"averagewaitingtime AS avgwaitingtime, " .
@@ -99,6 +106,11 @@ if ($statisticstype == 'bydate') {
 	$page['reportByDateTotal'] = $db->query(
 		"SELECT DATE(FROM_UNIXTIME(date)) AS date, " .
 			"SUM(threads) AS threads, " .
+			"SUM(missedthreads) AS missedthreads, " .
+			"SUM(sentinvitations) AS sentinvitations, " .
+			"SUM(acceptedinvitations) AS acceptedinvitations, " .
+			"SUM(rejectedinvitations) AS rejectedinvitations, " .
+			"SUM(ignoredinvitations) AS ignoredinvitations, " .
 			"SUM(operatormessages) AS agents, " .
 			"SUM(usermessages) AS users, " .
 			"ROUND(SUM(averagewaitingtime * s.threads) / SUM(s.threads),1) AS avgwaitingtime, " .
diff --git a/src/messenger/webim/view/statistics.php b/src/messenger/webim/view/statistics.php
index 0a5eedca..70fe92cc 100644
--- a/src/messenger/webim/view/statistics.php
+++ b/src/messenger/webim/view/statistics.php
@@ -80,6 +80,8 @@ require_once('inc_errors.php');
 	<?php echo getlocal("report.bydate.1") ?>
 </th><th>
 	<?php echo getlocal("report.bydate.2") ?>
+</th><th>
+	<?php echo getlocal("report.bydate.7") ?>
 </th><th>
 	<?php echo getlocal("report.bydate.3") ?>
 </th><th>
@@ -88,7 +90,19 @@ require_once('inc_errors.php');
 	<?php echo getlocal("report.bydate.5") ?>
 </th><th>
 	<?php echo getlocal("report.bydate.6") ?>
-</th></tr>
+</th>
+<?php if ($page['show_invitations_info']) { ?>
+<th>
+	<?php echo getlocal("report.bydate.8") ?>
+</th><th>
+	<?php echo getlocal("report.bydate.9") ?>
+</th><th>
+	<?php echo getlocal("report.bydate.10") ?>
+</th><th>
+	<?php echo getlocal("report.bydate.11") ?>
+</th>
+<?php } ?>
+</tr>
 </thead>
 <tbody>
 <?php if( $page['reportByDate'] ) { ?>
@@ -96,23 +110,37 @@ require_once('inc_errors.php');
 	<tr>
 		<td><?php echo $row['date'] ?></td>
 		<td><?php echo $row['threads'] ?></td>
+		<td><?php echo $row['missedthreads'] ?></td>
 		<td><?php echo $row['agents'] ?></td>
 		<td><?php echo $row['users'] ?></td>
 		<td><?php echo $row['avgwaitingtime'] ?></td>
 		<td><?php echo $row['avgchattime'] ?></td>
+		<?php if ($page['show_invitations_info']) { ?>
+		<td><?php echo $row['sentinvitations'] ?></td>
+		<td><?php echo $row['acceptedinvitations'] ?></td>
+		<td><?php echo $row['rejectedinvitations'] ?></td>
+		<td><?php echo $row['ignoredinvitations'] ?></td>
+		<?php } ?>
 	</tr>
 	<?php } ?>
 	<tr>
 		<td><b><?php echo getlocal("report.total") ?></b></td>
 		<td><?php echo $page['reportByDateTotal']['threads'] ?></td>
+		<td><?php echo $page['reportByDateTotal']['missedthreads'] ?></td>
 		<td><?php echo $page['reportByDateTotal']['agents'] ?></td>
 		<td><?php echo $page['reportByDateTotal']['users'] ?></td>
 		<td><?php echo $page['reportByDateTotal']['avgwaitingtime'] ?></td>
 		<td><?php echo $page['reportByDateTotal']['avgchattime'] ?></td>
+		<?php if ($page['show_invitations_info']) { ?>
+		<td><?php echo $page['reportByDateTotal']['sentinvitations'] ?></td>
+		<td><?php echo $page['reportByDateTotal']['acceptedinvitations'] ?></td>
+		<td><?php echo $page['reportByDateTotal']['rejectedinvitations'] ?></td>
+		<td><?php echo $page['reportByDateTotal']['ignoredinvitations'] ?></td>
+		<?php } ?>
 	</tr>
 <?php } else { ?>
 	<tr>
-	<td colspan="6">
+	<td colspan="<?php $page['show_invitations_info'] ? 11 : 7; ?>">
 		<?php echo getlocal("report.no_items") ?>
 	</td>
 	</tr>