diff --git a/Code/Mantid/MantidQt/CustomInterfaces/inc/MantidQtCustomInterfaces/IndirectDataAnalysis.ui b/Code/Mantid/MantidQt/CustomInterfaces/inc/MantidQtCustomInterfaces/IndirectDataAnalysis.ui
index fd81e24ad6fc898213eba1b3c957d8f98fd7f814..15134170dff453a80809c43a5b22dcd751a9d8b1 100644
--- a/Code/Mantid/MantidQt/CustomInterfaces/inc/MantidQtCustomInterfaces/IndirectDataAnalysis.ui
+++ b/Code/Mantid/MantidQt/CustomInterfaces/inc/MantidQtCustomInterfaces/IndirectDataAnalysis.ui
@@ -811,13 +811,6 @@
           <layout class="QVBoxLayout" name="confit_layoutProperties" >
            <item>
             <layout class="QVBoxLayout" name="confit_layoutOptions" >
-             <item>
-              <widget class="QCheckBox" name="confit_ckPlotGuess" >
-               <property name="text" >
-                <string>Plot Guess</string>
-               </property>
-              </widget>
-             </item>
              <item>
               <layout class="QHBoxLayout" name="confit_layoutFitType" >
                <item>
@@ -848,13 +841,6 @@
                </item>
               </layout>
              </item>
-             <item>
-              <widget class="QCheckBox" name="confit_ckFixCentres" >
-               <property name="text" >
-                <string>Fix Peak Centres</string>
-               </property>
-              </widget>
-             </item>
              <item>
               <layout class="QHBoxLayout" name="confit_layoutBackground" >
                <item>
@@ -885,6 +871,24 @@
                </item>
               </layout>
              </item>
+             <item>
+              <layout class="QHBoxLayout" name="horizontalLayout_30" >
+               <item>
+                <widget class="QCheckBox" name="confit_ckFixCentres" >
+                 <property name="text" >
+                  <string>Fix Peak Centres</string>
+                 </property>
+                </widget>
+               </item>
+               <item>
+                <widget class="QCheckBox" name="confit_ckPlotGuess" >
+                 <property name="text" >
+                  <string>Plot Guess</string>
+                 </property>
+                </widget>
+               </item>
+              </layout>
+             </item>
             </layout>
            </item>
            <item>
@@ -902,7 +906,7 @@
              <item>
               <widget class="QLabel" name="confit_lbSpecNo" >
                <property name="text" >
-                <string>Spectra No:</string>
+                <string>Spectra Range</string>
                </property>
               </widget>
              </item>
@@ -919,6 +923,26 @@
                </property>
               </widget>
              </item>
+             <item>
+              <widget class="QLabel" name="label_2" >
+               <property name="text" >
+                <string>to</string>
+               </property>
+              </widget>
+             </item>
+             <item>
+              <widget class="QLineEdit" name="confit_leSpecMax" >
+               <property name="sizePolicy" >
+                <sizepolicy vsizetype="Fixed" hsizetype="Maximum" >
+                 <horstretch>0</horstretch>
+                 <verstretch>0</verstretch>
+                </sizepolicy>
+               </property>
+               <property name="text" >
+                <string>-1</string>
+               </property>
+              </widget>
+             </item>
             </layout>
            </item>
           </layout>
diff --git a/Code/Mantid/MantidQt/CustomInterfaces/src/IndirectDataAnalysis.cpp b/Code/Mantid/MantidQt/CustomInterfaces/src/IndirectDataAnalysis.cpp
index 799413440017f374b1d3560e2d45f04b12345033..e35182b363563244d065e199e2417c5fd89ed9a0 100644
--- a/Code/Mantid/MantidQt/CustomInterfaces/src/IndirectDataAnalysis.cpp
+++ b/Code/Mantid/MantidQt/CustomInterfaces/src/IndirectDataAnalysis.cpp
@@ -441,6 +441,7 @@ void IndirectDataAnalysis::setupConFit()
   connect(m_uiForm.confit_pbSequential, SIGNAL(clicked()), this, SLOT(confitSequential()));
 
   m_uiForm.confit_leSpecNo->setValidator(m_valInt);
+  m_uiForm.confit_leSpecMax->setValidator(m_valInt);
 }
 
 void IndirectDataAnalysis::setupAbsorptionF2Py()
@@ -2115,6 +2116,16 @@ void IndirectDataAnalysis::confitPlotInput()
   m_cfInputWSName = wsname;
 
   int specNo = m_uiForm.confit_leSpecNo->text().toInt();
+  // Set spectra max value
+  int specMax = m_cfInputWS->getNumberHistograms() - 1;
+  if ( specNo < 0 || specNo > specMax )
+  {
+    m_uiForm.confit_leSpecNo->setText("0");
+    specNo = 0;
+  }
+  int smCurrent = m_uiForm.confit_leSpecMax->text().toInt();
+  if ( smCurrent < 0 || smCurrent > specMax )
+    m_uiForm.confit_leSpecMax->setText(QString::number(specMax));
 
   m_cfDataCurve = plotMiniplot(m_cfPlot, m_cfDataCurve, wsname, specNo);
   int npnts = m_cfDataCurve->data().size();
@@ -2221,6 +2232,8 @@ void IndirectDataAnalysis::confitSequential()
     "func = r'" + QString::fromStdString(function) + "'\n"
     "startx = " + stX + "\n"
     "endx = " + enX + "\n"
+    "specMin = " + m_uiForm.confit_leSpecNo->text() + "\n"
+    "specMax = " + m_uiForm.confit_leSpecMax->text() + "\n"
     "plot = '" + m_uiForm.confit_cbPlotOutput->currentText() + "'\n"
     "save = ";
   
@@ -2228,7 +2241,7 @@ void IndirectDataAnalysis::confitSequential()
   
   pyInput +=    
     "bg = '" + bg + "'\n"
-    "confitSeq(input, func, startx, endx, save, plot, bg)\n";
+    "confitSeq(input, func, startx, endx, save, plot, bg, specMin, specMax)\n";
 
   QString pyOutput = runPythonCode(pyInput);
 }
diff --git a/Code/Mantid/Scripts/Inelastic/IndirectDataAnalysis.py b/Code/Mantid/Scripts/Inelastic/IndirectDataAnalysis.py
index 4da18ae24e95ef038e4869b895d4f2218b6f43e2..b39dc67f3ee4c073a20b0d79989db9b86590fa13 100644
--- a/Code/Mantid/Scripts/Inelastic/IndirectDataAnalysis.py
+++ b/Code/Mantid/Scripts/Inelastic/IndirectDataAnalysis.py
@@ -61,14 +61,16 @@ def concatWSs(workspaces, unit, name):
     CreateWorkspace(name, dataX, dataY, dataE, NSpec = len(workspaces),
         UnitX=unit)
 
-def confitParsToWS(Table, Data, BackG='FixF'):
+def confitParsToWS(Table, Data, BackG='FixF', specMin=0, specMax=-1):
+    if ( specMax == -1 ):
+        specMax = mtd[Data].getNumberHistograms() - 1
     dataX = []
     if mtd[Data].getAxis(1).isSpectra():
         ConvertSpectrumAxis(Data, 'inq', 'MomentumTransfer', 'Indirect')
         Transpose('inq', 'inq')
         readX = mtd['inq'].readX(0)
         nBins = len(readX)
-        for i in range(0,nBins):
+        for i in range(specMin, specMax+1):
             dataX.append(readX[i])
         mtd.deleteWorkspace('inq')
     else:
@@ -82,7 +84,7 @@ def confitParsToWS(Table, Data, BackG='FixF'):
             msg += 'Input must have axis values of Q'
             print msg
             sys.exit(msg)
-        for i in range(0, mtd[Data].getNumberHistograms()):
+        for i in range(specMin, specMax+1):
             dataX.append(float(axis.label(i)))
     xAxisVals = []
     dataY = []
@@ -127,13 +129,15 @@ def confitPlotSeq(inputWS, plot):
             plotSpecs.append(i)
     plotSpectrum(inputWS, plotSpecs)
 
-def confitSeq(inputWS, func, startX, endX, save, plot, bg):
-    input = inputWS+',i0'
-    for i in range(1, mtd[inputWS].getNumberHistograms()):
+def confitSeq(inputWS, func, startX, endX, save, plot, bg, specMin, specMax):
+    input = inputWS+',i' + str(specMin)
+    if (specMax == -1):
+        specMax = mtd[inputWS].getNumberHistograms() - 1
+    for i in range(specMin + 1, specMax + 1):
         input += ';'+inputWS+',i'+str(i)
     outNm = getWSprefix(inputWS) + '_conv_'
     PlotPeakByLogValue(input, outNm, func, StartX=startX, EndX=endX)
-    wsname = confitParsToWS(outNm, inputWS, bg)
+    wsname = confitParsToWS(outNm, inputWS, bg, specMin, specMax)
     if save:
             SaveNexusProcessed(wsname, wsname+'.nxs')
     if plot != 'None':