diff --git a/lib/ruby-progressbar/calculators/smoothed_average.rb b/lib/ruby-progressbar/calculators/smoothed_average.rb
index d6357f2..fbe365d 100644
--- a/lib/ruby-progressbar/calculators/smoothed_average.rb
+++ b/lib/ruby-progressbar/calculators/smoothed_average.rb
@@ -1,27 +1,47 @@
 class   ProgressBar
 module  Calculators
 class   SmoothedAverage
-  DEFAULT_STRENGTH = 0.1
+  DEFAULT_STRENGTH           = 0.1
+  DEFAULT_BEGINNING_POSITION = 0
 
-  attr_accessor :strength
+  attr_accessor :samples,
+                :strength
   attr_reader   :projection
 
   def initialize(options = {})
+    self.samples    = []
     self.projection = 0.0
     self.strength   = options[:strength] || DEFAULT_STRENGTH
+
+    start(:at => DEFAULT_BEGINNING_POSITION)
   end
 
-  def start(_options = {})
+  def start(options = {})
     self.projection = 0.0
+    self.progress   = samples[0] = (options[:at] || progress)
+  end
+
+  def decrement
+    self.progress -= 1
+  end
+
+  def increment
+    self.progress += 1
+  end
+
+  def progress
+    samples[1]
+  end
+
+  def progress=(new_progress)
+    samples[1] = new_progress
+    calculate(absolute)
   end
 
-  def decrement; end
-  def increment; end
-  def progress=(_new_progress); end
   def total=(_new_total); end
 
   def reset
-    start
+    start(:at => samples[0])
   end
 
   def calculate(new_value)
@@ -44,6 +64,12 @@ def self.calculate(current_projection, new_value, rate)
   protected
 
   attr_writer :projection
+
+  private
+
+  def absolute
+    samples[1] - samples[0]
+  end
 end
 end
 end
diff --git a/lib/ruby-progressbar/progress.rb b/lib/ruby-progressbar/progress.rb
index a5faba3..5d66176 100644
--- a/lib/ruby-progressbar/progress.rb
+++ b/lib/ruby-progressbar/progress.rb
@@ -62,7 +62,6 @@ def progress=(new_progress)
     end
 
     @progress = new_progress
-    running_average_calculator.calculate(absolute)
   end
 
   def running_average
diff --git a/spec/lib/ruby-progressbar/calculators/smoothed_average_spec.rb b/spec/lib/ruby-progressbar/calculators/smoothed_average_spec.rb
index cccdbfa..6d7264c 100644
--- a/spec/lib/ruby-progressbar/calculators/smoothed_average_spec.rb
+++ b/spec/lib/ruby-progressbar/calculators/smoothed_average_spec.rb
@@ -41,6 +41,19 @@ module   Calculators
 
       expect(projector.projection).to be 0.0
     end
+
+    it 'resets based on the starting position' do
+      projector = SmoothedAverage.new(:strength => 0.1)
+      projector.start(:at => 10)
+      projector.progress = 20
+
+      expect(projector.projection).not_to be_zero
+
+      projector.reset
+      projector.progress = 20
+
+      expect(projector.projection).to be 9.0
+    end
   end
 
   describe '#strength' do
diff --git a/spec/lib/ruby-progressbar/progress_spec.rb b/spec/lib/ruby-progressbar/progress_spec.rb
index b32da5f..c817cd7 100644
--- a/spec/lib/ruby-progressbar/progress_spec.rb
+++ b/spec/lib/ruby-progressbar/progress_spec.rb
@@ -129,6 +129,7 @@ class    ProgressBar
 
     expect(progress.running_average).to be_zero
 
+    projector.progress += 40
     progress.progress += 40
 
     expect(progress.running_average).to eql 36.0