diff --git a/rowers/templates/summary_edit.html b/rowers/templates/summary_edit.html
index fb021a59..8b303bc4 100644
--- a/rowers/templates/summary_edit.html
+++ b/rowers/templates/summary_edit.html
@@ -59,6 +59,17 @@
         <td>
       </tr>
     </table>
+		<h1>Feeling lucky?</h1>
+		<p>
+			<form enctype="multipart/form-data" method="post">
+				<input type="hidden" name="ruptures" value="ruptures">
+				<table width=100%>
+					{{ ruptureform.as_table }}
+				</table>
+				{% csrf_token %}
+				<input class="button" type="submit" value="I'm feeling lucky">
+			</form>
+			</p>
     <h1>Interval Shorthand</h1>
     <p>
       See the how-to <a href="#howto">at the bottom of this page</a> for details on how to use this form.
diff --git a/rowers/tests/testdata/testdata.tcx.gz b/rowers/tests/testdata/testdata.tcx.gz
new file mode 100644
index 00000000..887f897c
Binary files /dev/null and b/rowers/tests/testdata/testdata.tcx.gz differ
diff --git a/rowers/views/workoutviews.py b/rowers/views/workoutviews.py
index 394d10f1..74580789 100644
--- a/rowers/views/workoutviews.py
+++ b/rowers/views/workoutviews.py
@@ -18,6 +18,8 @@ from rowers.utils import intervals_to_string
 from urllib.parse import urlparse, parse_qs
 from json.decoder import JSONDecodeError
 
+import ruptures as rpt
+
 def default(o): # pragma: no cover
     if isinstance(o, numpy.int64): return int(o)
     if isinstance(o, numpy.int32): return int(o)
@@ -6140,6 +6142,42 @@ def workout_summary_edit_view(request,id,message="",successmessage=""
 
     powerupdateform = PowerIntervalUpdateForm(initial=data)
 
+    # feeling lucky / ruptures
+    if request.method == 'POST' and "ruptures" in request.POST:
+        df = pd.DataFrame({
+            'spm':rowdata.df[' Cadence (stokes/min)'],
+            'power':rowdata.df[' Power (watts)'],
+            'v':rowdata.df[' AverageBoatSpeed (m/s)']
+        })
+        algo = rpt.Pelt(model="rbf").fit(df.values)
+        result = algo.predict(pen=10)
+
+
+        df['time'] =  rowdata.df['TimeStamp (sec)'].values
+        timeprev = int(df['time'].values[0])
+        timenext = int(df['time'].values[result[0]])
+        s = '{delta}sec'.format(delta=timenext-timeprev)
+
+
+        for i in range(len(result)-1):
+            timeprev = int(df['time'].values[result[i]-1])
+            timenext = int(df['time'].values[result[i+1]-1])
+            interval =  '+{delta}sec'.format(delta=timenext-timeprev)
+            s += interval
+
+        try:
+            rowdata.updateinterval_string(s)
+        except:
+            messages.error(request,"Nope, you were not lucky")
+
+        intervalstats = rowdata.allstats()
+        itime, idist, itype = rowdata.intervalstats_values()
+        nrintervals = len(idist)
+        savebutton = 'savestringform'
+        intervalString = s
+        form = SummaryStringForm(initial={'intervalstring':intervalString})
+
+
     # We have submitted the mini language interpreter
     if request.method == 'POST' and "intervalstring" in request.POST:
         form = SummaryStringForm(request.POST)