diff --git a/src/api/controller/accounts.py b/src/api/controller/accounts.py
index b59d1f4..3ac705d 100644
--- a/src/api/controller/accounts.py
+++ b/src/api/controller/accounts.py
@@ -19,6 +19,7 @@ def get_accounts():
     query = session.query(
       Account.id.label("id"),
       Account.name.label("name"),
+      Account.authorized_overdraft.label("authorized_overdraft"),
       func.sum(Entry.value).label("future"),
       func.sum(case([(Entry.operation_date != None, Entry.value,)], else_=cast(0, db.Numeric(15, 2)))).label("pointed"),
       func.sum(case([(Entry.value_date < func.now(), Entry.value,)], else_=cast(0, db.Numeric(15, 2)))).label("current")
@@ -27,6 +28,7 @@ def get_accounts():
     return json.dumps([{
         "id": i.id,
         "name": i.name,
+        "authorized_overdraft": i.authorized_overdraft,
         "current": str(i.current),
         "pointed": str(i.pointed),
         "future": str(i.future)
@@ -51,7 +53,7 @@ def add_account():
     session = db.create_scoped_session()
 
     try:
-        account = Account(request.json['name'])
+        account = Account(request.json['name'], request.json['authorized_overdraft'])
 
         session.add(account)
         session.commit()
@@ -70,6 +72,7 @@ def update_account(account_id):
         account = session.query(Account).filter(Account.id == account_id).first()
 
         account.name = request.json['name']
+        account.authorized_overdraft = request.json['authorized_overdraft']
 
         session.merge(account)
         session.commit()
diff --git a/src/api/model/accounts.py b/src/api/model/accounts.py
index f2b12d4..1fd87de 100644
--- a/src/api/model/accounts.py
+++ b/src/api/model/accounts.py
@@ -4,7 +4,9 @@ from app import db
 class Account(db.Model):
     id = db.Column(db.Integer, primary_key = True)
     name = db.Column(db.String(200), nullable = False)
+    authorized_overdraft = db.Column(db.Integer, nullable = True, default = 0)
 
-    def __init__(self, name):
+    def __init__(self, name, authorized_overdraft):
         self.name = name
+        self.authorized_overdraft = authorized_overdraft
 
diff --git a/src/html/index.html b/src/html/index.html
index b4fffda..016a7de 100644
--- a/src/html/index.html
+++ b/src/html/index.html
@@ -120,6 +120,10 @@
             <div class="controls">
               <input type="text" id="inputName" data-bind="value: name"></input>
             </div>
+            <label class="control-label" for="inputAuthorizedOverdraft">D&eacute;couvert authoris&eacute;</label>
+            <div class="controls">
+              <input type="text" id="inputAuthorizedOverdraft" data-bind="value: authorized_overdraft"></input>
+            </div>
           </div>
         </form>
       </div>
@@ -130,13 +134,13 @@
     </div>
 
     <script id="itemsTmpl" type="text/html">
-      <tr data-bind="css: { 'error': sold() < 0 }">
+      <tr data-bind="css: { 'warning': sold() < 0 && sold() >= $root.account().authorized_overdraft(), 'error': sold() < $root.account().authorized_overdraft() }">
         <td data-bind="text: value_date"></td>
         <td data-bind="text: operation_date"></td>
         <td data-bind="text: label"></td>
         <td data-bind="text: value, css: {'text-error': value() < 0 }"></td>
-        <td data-bind="text: sold, css: {'text-error': sold() < 0 }"></td>
-        <td data-bind="text: operation_date() ? pointedsold : '', css: {'text-error': operation_date() && pointedsold() < 0 }"></td>
+        <td data-bind="text: sold, css: {'text-warning': sold() < 0 && sold() >= $root.account().authorized_overdraft(), 'text-error': sold() < $root.account().authorized_overdraft() }"></td>
+        <td data-bind="text: operation_date() ? pointedsold : '', css: {'text-warning': pointedsold() < 0 && pointedsold() >= $root.account().authorized_overdraft(), 'text-error': pointedsold() < $root.account().authorized_overdraft() }"></td>
         <td data-bind="text: category"></td>
         <td class="buttons">
           <a class="btn btn-mini" data-bind="click: $root.edit" href="#" title="edit"><i class="icon-edit"></i></a>
diff --git a/src/html/js/entries.js b/src/html/js/entries.js
index afe852c..e6022f5 100644
--- a/src/html/js/entries.js
+++ b/src/html/js/entries.js
@@ -15,6 +15,7 @@ function entry(){
 function account() {
     this.id=ko.observable();
     this.name=ko.observable();
+    this.authorized_overdraft=ko.observable();
     this.future=ko.observable();
     this.current=ko.observable();
     this.pointed=ko.observable();
@@ -72,7 +73,8 @@ var ListViewModel = function() {
     self.addAccount = function() {
       self.editingAccount(ko.mapping.fromJS({
         id: null,
-        name: null
+        name: null,
+        authorized_overdraft: null
       }));
 
       $("#edit-account").modal();
@@ -88,6 +90,7 @@ var ListViewModel = function() {
     self.cancelEditAccount = function() {
       if(self.editingAccount() && self.savedAccount) {
         self.editingAccount().name(self.savedAccount.name);
+        self.editingAccount().authorized_overdraft(self.savedAccount.authorized_overdraft);
       }
 
       self.editingAccount(null);
@@ -195,7 +198,7 @@ var ListViewModel = function() {
         }
       });
 
-      return chartValues;
+      return {account: self.account(), entries: chartValues};
     }, self);
 
     // Function to load entries from server for a specific account and month.
@@ -224,26 +227,26 @@ var ListViewModel = function() {
         // Update accounts
         self.accounts(ko.utils.arrayMap($.parseJSON(data), ko.mapping.fromJS));
 
+        var accountToSelect = null
+
         // Reset selected account to the new instance corresponding to the old one.
         if(self.account()) {
-          var oldId = self.account().id();
-
-          // Reset to null
-          self.account(null);
-
           // Find the new instance of the previously selected account.
           $.each(self.accounts(), function(index, account) {
-            if(account.id() == oldId) {
-              self.account(account);
+            if(account.id() == self.account().id()) {
+              accountToSelect = account;
             }
           });
         }
 
         // Set selected account to first one if not yet selected
-        if(!self.account() && self.accounts().length > 0){
-          self.account(self.accounts()[0]);
+        if(!accountToSelect && self.accounts().length > 0){
+          accountToSelect = self.accounts()[0];
         }
 
+        // Reset to account to select
+        self.account(accountToSelect);
+
         // Load months if there is any account, or remove months.
         if(self.account()) {
           self.loadMonths(self.account());
@@ -259,27 +262,26 @@ var ListViewModel = function() {
         // Update months
         self.months(ko.utils.arrayMap($.parseJSON(data), ko.mapping.fromJS));
         
+        var monthToSelect = null;
+
         // Reset selected month to the new instance corresponding to the old one
         if(self.month()) {
-          var oldYear = self.month().year();
-          var oldMonth = self.month().month();
-
-          // Reset to null
-          self.month(null);
-
           // Find the new instance of the previously selected month.
           $.each(self.months(), function(index, month) {
-            if(month.year() == oldYear && month.month() == oldMonth) {
-              self.month(month);
+            if(month.year() === self.month().year() && month.month() === self.month().month()) {
+              monthToSelect = month;
             }
           });
         }
 
         // Set selected month to the last one if not yet selected.
-        if(!self.month() && self.months().length > 0) {
-          self.month(self.months()[self.months().length - 1]);
+        if(!monthToSelect && self.months().length > 0) {
+          monthToSelect = self.months()[self.months().length - 1];
         }
 
+        // Reset to month to select
+        self.month(monthToSelect);
+
         // Load entries if there is a month or remove entries.
         if(self.month) {
           self.loadEntries(self.account(), self.month());
@@ -430,10 +432,12 @@ var ListViewModel = function() {
 };
 
 // Function to draw the sold evolution chart.
-drawChart = function(entries, element) {
+drawChart = function(data, element) {
   // Clear previous chart
   $(element).html("");
 
+  var entries = data.entries;
+
   if(entries && entries.length > 0) {
     // Prepare for today vertical line.
     var today = new Date();
@@ -494,11 +498,19 @@ drawChart = function(entries, element) {
         canvasOverlay: {
           show: true,
           objects: [
-            // Red horizontal line for 0 limit
+            // Orange horizontal line for 0 limit
             {dashedHorizontalLine: {
               name: "zero",
               y: 0,
               lineWidth: 1,
+              color: "orange",
+              shadow: false
+            }},
+            // Red horizontal line for authorized overdraft limit
+            {dashedHorizontalLine: {
+              name: "overdraft",
+              y: data.account.authorized_overdraft(),
+              lineWidth: 1,
               color: "red",
               shadow: false
             }},
@@ -573,8 +585,8 @@ ko.bindingHandlers.chart = {
       var unwrap = ko.utils.unwrapObservable;
       var dataSource = valueAccessor();
 
-      var entries = dataSource ? unwrap(dataSource) : null;
-      drawChart(entries, element);
+      var data = dataSource ? unwrap(dataSource) : null;
+      drawChart(data, element);
     }
 };
 
diff --git a/src/sql/install/01_init.sql b/src/sql/install/01_init.sql
index 06f202e..9e00ed6 100644
--- a/src/sql/install/01_init.sql
+++ b/src/sql/install/01_init.sql
@@ -8,6 +8,20 @@ SET standard_conforming_strings = on;
 SET check_function_bodies = false;
 SET client_min_messages = warning;
 
+--
+-- Name: plpgsql; Type: EXTENSION; Schema: -; Owner: -
+--
+
+CREATE EXTENSION IF NOT EXISTS plpgsql WITH SCHEMA pg_catalog;
+
+
+--
+-- Name: EXTENSION plpgsql; Type: COMMENT; Schema: -; Owner: -
+--
+
+COMMENT ON EXTENSION plpgsql IS 'PL/pgSQL procedural language';
+
+
 SET search_path = public, pg_catalog;
 
 SET default_tablespace = '';
@@ -20,7 +34,8 @@ SET default_with_oids = false;
 
 CREATE TABLE account (
     id integer NOT NULL,
-    name character varying(200) NOT NULL
+    name character varying(200) NOT NULL,
+    authorized_overdraft integer DEFAULT 0 NOT NULL
 );
 
 
@@ -130,6 +145,16 @@ ALTER TABLE ONLY entry
     ADD CONSTRAINT entry_account_id_fkey FOREIGN KEY (account_id) REFERENCES account(id);
 
 
+--
+-- Name: public; Type: ACL; Schema: -; Owner: -
+--
+
+REVOKE ALL ON SCHEMA public FROM PUBLIC;
+REVOKE ALL ON SCHEMA public FROM postgres;
+GRANT ALL ON SCHEMA public TO postgres;
+GRANT ALL ON SCHEMA public TO PUBLIC;
+
+
 --
 -- PostgreSQL database dump complete
 --
diff --git a/src/sql/update/0.1-0.2/001_authorized_overdraft.sql b/src/sql/update/0.1-0.2/001_authorized_overdraft.sql
new file mode 100644
index 0000000..6d017d8
--- /dev/null
+++ b/src/sql/update/0.1-0.2/001_authorized_overdraft.sql
@@ -0,0 +1,2 @@
+ALTER TABLE account ADD COLUMN authorized_overdraft INTEGER NOT NULL DEFAULT 0;
+