diff --git a/sql/cambios.sql b/sql/cambios.sql
index 2285077da..69e6c1500 100644
--- a/sql/cambios.sql
+++ b/sql/cambios.sql
@@ -10516,4 +10516,7 @@ CREATE TABLE IF NOT EXISTS usr_figures (UsrCod INT NOT NULL,FirstClickTime DATET
 
 
 
+SELECT * FROM usr_figures WHERE NumClicks>='0' AND FirstClickTime>'0';
 
+SELECT COUNT(*)+1 FROM (SELECT NumClicks/(DATEDIFF(NOW(),FirstClickTime)+1) AS NumClicksPerDay FROM usr_figures WHERE NumClicks>='0' AND UNIX_TIMESTAMP(FirstClickTime)>'0') AS TableNumClicksPerDay WHERE NumClicksPerDay>(SELECT NumClicks/(DATEDIFF(NOW(),FirstClickTime)+1) FROM usr_figures WHERE UsrCod='1' AND NumClicks>='0' AND UNIX_TIMESTAMP(FirstClickTime)>'0');
+               
diff --git a/sql/swad.sql b/sql/swad.sql
index cfb4f4d5a..2a3cebd3c 100644
--- a/sql/swad.sql
+++ b/sql/swad.sql
@@ -1178,7 +1178,9 @@ CREATE TABLE IF NOT EXISTS usr_figures (
 	NumClicks INT NOT NULL DEFAULT -1,
 	NumForPst INT NOT NULL DEFAULT -1,
 	NumMsgSnt INT NOT NULL DEFAULT -1,
-	PRIMARY KEY(UsrCod));
+	PRIMARY KEY(UsrCod),
+	INDEX(FirstClickTime),
+	INDEX(NumClicks));
 --
 -- Table usr_last: stores some variable data related to users
 --
diff --git a/swad_changelog.h b/swad_changelog.h
index 2caf94d50..78c34ec6d 100644
--- a/swad_changelog.h
+++ b/swad_changelog.h
@@ -103,11 +103,18 @@
 /****************************** Public constants *****************************/
 /*****************************************************************************/
 
-#define Log_PLATFORM_VERSION	"SWAD 14.87.1 (2015/03/11)"
+#define Log_PLATFORM_VERSION	"SWAD 14.87.4 (2015/03/11)"
 
 // Number of lines (includes comments but not blank lines) has been got with the following command:
 // nl swad*.c swad*.h css/swad*.css py/swad*.py js/swad*.js soap/swad*.h sql/swad*.sql | tail -1
 /*
+        Version 14.87.4:  Mar 11, 2015	Added indexes to usr_figures. (181629 lines)
+					2 changes necessary in database:
+CREATE INDEX FirstClickTime ON usr_figures (FirstClickTime);
+CREATE INDEX NumClicks ON usr_figures (NumClicks);
+
+        Version 14.87.3:  Mar 11, 2015	Fix bug comparing first click dates in user's figures. (181623 lines)
+        Version 14.87.2:  Mar 11, 2015	Fix bug comparing first click dates in user's figures. (181614 lines)
         Version 14.87.1:  Mar 11, 2015	Fix style in CSS and record. (181613 lines)
         Version 14.87:    Mar 11, 2015	Ranking according to the number of clicks. (181611 lines)
         Version 14.86:    Mar 11, 2015	Show user's figures per days. (181525 lines)
diff --git a/swad_database.c b/swad_database.c
index fdec5e94a..2b4b744d8 100644
--- a/swad_database.c
+++ b/swad_database.c
@@ -2344,8 +2344,8 @@ mysql> DESCRIBE usr_figures;
 | Field          | Type     | Null | Key | Default | Extra |
 +----------------+----------+------+-----+---------+-------+
 | UsrCod         | int(11)  | NO   | PRI | NULL    |       |
-| FirstClickTime | datetime | NO   |     | NULL    |       |
-| NumClicks      | int(11)  | NO   |     | -1      |       |
+| FirstClickTime | datetime | NO   | MUL | NULL    |       |
+| NumClicks      | int(11)  | NO   | MUL | -1      |       |
 | NumForPst      | int(11)  | NO   |     | -1      |       |
 | NumMsgSnt      | int(11)  | NO   |     | -1      |       |
 +----------------+----------+------+-----+---------+-------+
@@ -2357,7 +2357,7 @@ mysql> DESCRIBE usr_figures;
 	           "NumClicks INT NOT NULL DEFAULT -1,"
 	           "NumForPst INT NOT NULL DEFAULT -1,"
 	           "NumMsgSnt INT NOT NULL DEFAULT -1,"
-	           "PRIMARY KEY(UsrCod))");
+	           "PRIMARY KEY(UsrCod),INDEX(FirstClickTime),INDEX(NumClicks))");
 
 /***** Table usr_IDs *****/
 /*
diff --git a/swad_user.c b/swad_user.c
index c0abf316b..a9d13bb87 100644
--- a/swad_user.c
+++ b/swad_user.c
@@ -7883,10 +7883,13 @@ static unsigned long Usr_GetRankingNumClicks (long UsrCod)
   {
    char Query[128];
 
+   /***** Select number of rows with number of clicks
+          greater than the clicks of this user *****/
    sprintf (Query,"SELECT COUNT(*)+1 FROM usr_figures"
-	          " WHERE NumClicks>"
+	          " WHERE UsrCod<>'%ld'"	// Really not necessary here
+                  " AND NumClicks>"
 	          "(SELECT NumClicks FROM usr_figures WHERE UsrCod='%ld')",
-	    UsrCod);
+	    UsrCod,UsrCod);
    return DB_QueryCOUNT (Query,"can not get ranking using number of clicks");
   }
 
@@ -7898,6 +7901,7 @@ static unsigned long Usr_GetNumUsrsWithNumClicks (void)
   {
    char Query[128];
 
+   /***** Select number of rows with values already calculated *****/
    sprintf (Query,"SELECT COUNT(*) FROM usr_figures WHERE NumClicks>='0'");
    return DB_QueryCOUNT (Query,"can not get number of users with number of clicks");
   }
@@ -7910,18 +7914,21 @@ static unsigned long Usr_GetRankingNumClicksPerDay (long UsrCod)
   {
    char Query[512];
 
+   /***** Select number of rows with number of clicks per day
+          greater than the clicks per day of this user *****/
    sprintf (Query,"SELECT COUNT(*)+1 FROM"
                   " (SELECT NumClicks/(DATEDIFF(NOW(),FirstClickTime)+1)"
                   " AS NumClicksPerDay"
                   " FROM usr_figures"
-                  " WHERE NumClicks>='0' AND FirstClickTime>'0')"
+                  " WHERE UsrCod<>'%ld'"	// Necessary because the following comparison is not exact in floating point
+                  " AND NumClicks>='0' AND UNIX_TIMESTAMP(FirstClickTime)>'0')"
                   " AS TableNumClicksPerDay"
                   " WHERE NumClicksPerDay>"
                   "(SELECT NumClicks/(DATEDIFF(NOW(),FirstClickTime)+1)"
                   " FROM usr_figures"
                   " WHERE UsrCod='%ld'"
-                  " AND NumClicks>='0' AND FirstClickTime>'0');",
-	    UsrCod);
+                  " AND NumClicks>='0' AND UNIX_TIMESTAMP(FirstClickTime)>'0')",
+	    UsrCod,UsrCod);
    return DB_QueryCOUNT (Query,"can not get ranking using number of clicks per day");
   }
 
@@ -7933,8 +7940,9 @@ static unsigned long Usr_GetNumUsrsWithNumClicksPerDay (void)
   {
    char Query[128];
 
+   /***** Select number of rows with values already calculated *****/
    sprintf (Query,"SELECT COUNT(*) FROM usr_figures"
-	          " WHERE NumClicks>='0' AND FirstClickTime>'0'");
+	          " WHERE NumClicks>='0' AND UNIX_TIMESTAMP(FirstClickTime)>'0'");
    return DB_QueryCOUNT (Query,"can not get number of users with number of clicks per day");
   }