diff --git a/app/controllers/mezuro_ranges_controller.rb b/app/controllers/mezuro_ranges_controller.rb
index 7f4049e..9f7183a 100644
--- a/app/controllers/mezuro_ranges_controller.rb
+++ b/app/controllers/mezuro_ranges_controller.rb
@@ -2,18 +2,22 @@ include OwnershipAuthentication
 
 class MezuroRangesController < ApplicationController
 
+  before_action :authenticate_user!, except: [:show, :index]
+  before_action :metric_configuration_owner?, except: [:index]
+
   def new
     @mezuro_range = MezuroRange.new
-    @mezuro_range.metric_configuration_id = params[:metric_configuration_id].to_i
-    @mezuro_range.mezuro_configuration_id = params[:mezuro_configuration_id].to_i
-    @reading_group_id = MetricConfiguration.find(@mezuro_range.metric_configuration_id).reading_group_id
-    @readings = Reading.readings_of(@reading_group_id)
-  end
-
-  def show
+    before_form
   end
 
   def create
+    @mezuro_range = MezuroRange.new(mezuro_range_params)
+    @mezuro_configuration_id = params[:mezuro_configuration_id].to_i
+    @metric_configuration_id = params[:metric_configuration_id].to_i
+    @mezuro_range.metric_configuration_id = params[:metric_configuration_id].to_i
+    respond_to do |format|
+      create_and_redir(format)
+    end
   end
 
   def destroy
@@ -28,4 +32,32 @@ class MezuroRangesController < ApplicationController
   def edit
   end
 
+  private
+
+  def mezuro_range_params
+    params[:mezuro_range]
+  end
+
+  def create_and_redir(format)
+    if @mezuro_range.save
+      format.html { redirect_to mezuro_configuration_metric_configuration_path(
+          @mezuro_configuration_id, @metric_configuration_id), notice: 'The range was successfully created.' }
+    else
+      failed_action(format, 'new')
+    end
+  end
+
+  def failed_action(format, destiny_action)
+    before_form
+    format.html { render action: destiny_action }
+    format.json { render json: @mezuro_range.errors, status: :unprocessable_entity }
+  end
+
+  def before_form
+    @mezuro_configuration_id = params[:mezuro_configuration_id].to_i
+    @metric_configuration_id = params[:metric_configuration_id].to_i
+    @reading_group_id = MetricConfiguration.find(@metric_configuration_id).reading_group_id
+    @readings = Reading.readings_of(@reading_group_id)
+  end
+
 end
diff --git a/app/views/mezuro_ranges/_form.html.erb b/app/views/mezuro_ranges/_form.html.erb
index 73823e8..ee357da 100644
--- a/app/views/mezuro_ranges/_form.html.erb
+++ b/app/views/mezuro_ranges/_form.html.erb
@@ -24,8 +24,7 @@
     </div></br>    
   <% end %>
 
-
   <%= f.submit 'Save', class: 'btn btn-primary' %>
 
-  <%= link_to 'Back', mezuro_configuration_metric_configuration_path(@mezuro_range.mezuro_configuration_id, @mezuro_range.metric_configuration_id), 
+  <%= link_to 'Back', mezuro_configuration_metric_configuration_path(@mezuro_configuration_id, @metric_configuration_id), 
       class: 'btn btn-default' %>
diff --git a/app/views/mezuro_ranges/_no_readings.html.erb b/app/views/mezuro_ranges/_no_readings.html.erb
index f217e6e..8d033a4 100644
--- a/app/views/mezuro_ranges/_no_readings.html.erb
+++ b/app/views/mezuro_ranges/_no_readings.html.erb
@@ -1,21 +1,13 @@
 <div class="alert alert-error alert-dismissable">
-	<button type="button" class="close" data-dismiss="alert" aria-hidden="true">&times;</button>
-	<h4 class="alert-heading">There is not reading yet!</h4>
-	<p>	 
-		You need to create reading in your associeated reading group before create a range
-	</p>
+	<h4 class="alert-heading">You must have readings in your associated reading group to create a new range.</h4>
 	<p>
 		<% if reading_groups_owner? @reading_group_id %>
 			
-			<%= link_to 'Create New Reading', new_reading_group_reading_path(@reading_group_id), class: 'btn btn-danger' %>
+			<br /><%= link_to 'Create New Reading', new_reading_group_reading_path(@reading_group_id), class: 'btn btn-danger' %>
 		
 		<% else %>
-		
-			</p></div>
-			<div class="alert alert-error alert-dismissable">
-				<button type="button" class="close" data-dismiss="alert" aria-hidden="true">&times;</button>
-				<p> You are not allowed to do this operation, your reading belongs to another person. </p>
-			</div>
+
+				<p> Your metric configurations' reading group belongs to another user and you are not allowed to modify it.</p>
 		
 		<% end %>
 	</p>
diff --git a/app/views/mezuro_ranges/new.html.erb b/app/views/mezuro_ranges/new.html.erb
index c442237..9b91b99 100644
--- a/app/views/mezuro_ranges/new.html.erb
+++ b/app/views/mezuro_ranges/new.html.erb
@@ -1,6 +1,5 @@
 <h1>New Range</h1>
 
-<%= form_for(@mezuro_range, :url => mezuro_configuration_metric_configuration_path(@mezuro_range.mezuro_configuration_id, 
-    @mezuro_range.metric_configuration_id)) do |f|  %>
+<%= form_for(@mezuro_range, :url => mezuro_configuration_metric_configuration_mezuro_ranges_path(@mezuro_configuration_id, @metric_configuration_id)) do |f|  %>
   <%= render partial: 'form', locals: {f: f} %>
 <% end %>
\ No newline at end of file
diff --git a/spec/controllers/mezuro_ranges_spec.rb b/spec/controllers/mezuro_ranges_spec.rb
new file mode 100644
index 0000000..fe5fe58
--- /dev/null
+++ b/spec/controllers/mezuro_ranges_spec.rb
@@ -0,0 +1,35 @@
+require 'spec_helper'
+
+describe MezuroRangesController do
+
+  describe 'new' do
+    let(:mezuro_range) { FactoryGirl.build(:mezuro_range) }
+    let(:mezuro_configuration) { FactoryGirl.build(:mezuro_configuration) }
+    let(:metric_configuration) { FactoryGirl.build(:metric_configuration) }
+
+    before :each do
+      sign_in FactoryGirl.create(:user)
+    end
+
+    context 'when the current user owns the metric configuration' do
+      before :each do
+        subject.expects(:metric_configuration_owner?).returns true
+        MetricConfiguration.expects(:find).with(mezuro_range.metric_configuration_id).returns(metric_configuration)
+        Reading.expects(:readings_of).with(metric_configuration.reading_group_id).returns([])
+        get :new, mezuro_configuration_id: mezuro_configuration.id, metric_configuration_id: mezuro_range.metric_configuration_id
+      end
+
+      it { should respond_with(:success) }
+      it { should render_template(:new) }
+    end
+
+    context "when the current user doesn't owns the metric configuration" do
+      before :each do
+        get :new, mezuro_configuration_id: mezuro_configuration.id, metric_configuration_id: mezuro_range.metric_configuration_id
+      end
+
+      it { should redirect_to(mezuro_configurations_path) }
+      it { should respond_with(:redirect) }
+    end
+  end
+end
\ No newline at end of file
diff --git a/spec/factories/mezuro_ranges.rb b/spec/factories/mezuro_ranges.rb
index 59830e8..b29ee47 100644
--- a/spec/factories/mezuro_ranges.rb
+++ b/spec/factories/mezuro_ranges.rb
@@ -20,6 +20,7 @@ FactoryGirl.define do
     self.end 5.1 
     reading_id 3
     comments "Comment"
+    metric_configuration_id 32
 
     trait :another_comment do
       comments "Another Comment"
--
libgit2 0.21.2