diff --git a/web/static/js/swapp.js b/web/static/js/swapp.js
index 513d742..5773dae 100644
--- a/web/static/js/swapp.js
+++ b/web/static/js/swapp.js
@@ -313,9 +313,6 @@
       });
       this.time_series.forEach(function(ts){
         ts.options['onMouseOver'] = function(){
-          this$.time_series.forEach(function(ts2){
-            return ts2.showCursor();
-          });
           return true;
         };
         ts.options['onMouseOut'] = function(){
@@ -732,7 +729,8 @@
       i = this.bisectDate(this.data, x0, 1);
       d0 = this.data[i - 1];
       d1 = this.data[i];
-      if (!(d1 && d0)) {
+      if (!d1 || !d0) {
+        this.hideCursor();
         return;
       }
       d = x0 - d0.x > d1.x - x0 ? d1 : d0;
@@ -749,6 +747,7 @@
       this.cursorValueShadow.attr("transform", transform).text(d.y).attr('text-anchor', mirrored ? 'end' : 'start').attr("dx", dx);
       this.cursorDate.attr("transform", transform).text(this.timeFormat(d.x)).attr('text-anchor', mirrored ? 'end' : 'start').attr("dx", dx);
       this.cursorDateShadow.attr("transform", transform).text(this.timeFormat(d.x)).attr('text-anchor', mirrored ? 'end' : 'start').attr("dx", dx);
+      this.showCursor();
       return this;
     };
     return TimeSeries;
diff --git a/web/static/js/swapp.ls b/web/static/js/swapp.ls
index 3164526..121b3db 100644
--- a/web/static/js/swapp.ls
+++ b/web/static/js/swapp.ls
@@ -260,9 +260,10 @@ https://gitlab.irap.omp.eu/CDPP/SPACEWEATHERONLINE
           }
         ))
     )
-    @time_series.forEach((ts) ~>  # returning true may be faster
+    # Let's override all time series' input handlers to link them together
+    @time_series.forEach((ts) ~>  # returning true may be faster, how to bench?
       ts.options['onMouseOver'] = ~>
-        @time_series.forEach((ts2) -> ts2.showCursor()) ; true
+        true  # let's do nothing, we'll show the cursor during moveCursor()
       ts.options['onMouseOut'] = ~>
         @time_series.forEach((ts2) -> ts2.hideCursor()) ; true
       ts.options['onMouseMove'] = (t) ~>
@@ -651,7 +652,10 @@ export class TimeSeries
     i = @bisectDate(@data, x0, 1)
     d0 = @data[i - 1]
     d1 = @data[i]
-    return unless d1 and d0
+    if (not d1) or (not d0)
+      @hideCursor()
+      return
+
     d = if x0 - d0.x > d1.x - x0 then d1 else d0
     xx = @xScale(d.x)
     yy = @yScale(d.y)
@@ -675,6 +679,7 @@ export class TimeSeries
     @cursorDateShadow.attr("transform", transform).text(@timeFormat(d.x))
                      .attr('text-anchor', if mirrored then 'end' else 'start')
                      .attr("dx", dx)
+    @showCursor()
 
     this
 
--
libgit2 0.21.2