diff --git a/hgext/beautifygraph.py b/hgext/beautifygraph.py
--- a/hgext/beautifygraph.py
+++ b/hgext/beautifygraph.py
@@ -71,6 +71,8 @@
         return b'\xE2\x97\x8B'  # U+25CB ○
     if node == b'@':
         return b'\xE2\x97\x8D'  # U+25CD ◍
+    if node == b'%':
+        return b'\xE2\x97\x8D'  # U+25CE ◎
     if node == b'*':
         return b'\xE2\x88\x97'  # U+2217 ∗
     if node == b'x':
diff --git a/mercurial/hgweb/webutil.py b/mercurial/hgweb/webutil.py
--- a/mercurial/hgweb/webutil.py
+++ b/mercurial/hgweb/webutil.py
@@ -936,5 +936,5 @@
 
 def getgraphnode(repo, ctx):
     return templatekw.getgraphnodecurrent(
-        repo, ctx
+        repo, ctx, {}
     ) + templatekw.getgraphnodesymbol(ctx)
diff --git a/mercurial/logcmdutil.py b/mercurial/logcmdutil.py
--- a/mercurial/logcmdutil.py
+++ b/mercurial/logcmdutil.py
@@ -1004,7 +1004,7 @@
         ui, spec, defaults=templatekw.keywords, resources=tres
     )
 
-    def formatnode(repo, ctx):
+    def formatnode(repo, ctx, cache):
         props = {b'ctx': ctx, b'repo': repo}
         return templ.renderdefault(props)
 
@@ -1038,8 +1038,9 @@
         # experimental config: experimental.graphshorten
         state.graphshorten = ui.configbool(b'experimental', b'graphshorten')
 
+    formatnode_cache = {}
     for rev, type, ctx, parents in dag:
-        char = formatnode(repo, ctx)
+        char = formatnode(repo, ctx, formatnode_cache)
         copies = getcopies(ctx) if getcopies else None
         edges = edgefn(type, char, state, rev, parents)
         firstedge = next(edges)
diff --git a/mercurial/templatekw.py b/mercurial/templatekw.py
--- a/mercurial/templatekw.py
+++ b/mercurial/templatekw.py
@@ -396,26 +396,38 @@
     return templateutil.compatfileslist(context, mapping, b'file', ctx.files())
 
 
-@templatekeyword(b'graphnode', requires={b'repo', b'ctx'})
+@templatekeyword(b'graphnode', requires={b'repo', b'ctx', b'cache'})
 def showgraphnode(context, mapping):
     """String. The character representing the changeset node in an ASCII
     revision graph."""
     repo = context.resource(mapping, b'repo')
     ctx = context.resource(mapping, b'ctx')
-    return getgraphnode(repo, ctx)
+    cache = context.resource(mapping, b'cache')
+    return getgraphnode(repo, ctx, cache)
 
 
-def getgraphnode(repo, ctx):
-    return getgraphnodecurrent(repo, ctx) or getgraphnodesymbol(ctx)
+def getgraphnode(repo, ctx, cache):
+    return getgraphnodecurrent(repo, ctx, cache) or getgraphnodesymbol(ctx)
 
 
-def getgraphnodecurrent(repo, ctx):
+def getgraphnodecurrent(repo, ctx, cache):
     wpnodes = repo.dirstate.parents()
     if wpnodes[1] == nullid:
         wpnodes = wpnodes[:1]
     if ctx.node() in wpnodes:
         return b'@'
     else:
+        merge_nodes = cache.get(b'merge_nodes', ())
+        if not merge_nodes:
+            from . import merge
+
+            mergestate = merge.mergestate.read(repo)
+            if mergestate.active():
+                merge_nodes = (mergestate.local, mergestate.other)
+            cache[b'merge_nodes'] = merge_nodes
+
+        if ctx.node() in merge_nodes:
+            return b'%'
         return b''
 
 
diff --git a/relnotes/next b/relnotes/next
--- a/relnotes/next
+++ b/relnotes/next
@@ -1,5 +1,10 @@
 == New Features ==
 
+ * `hg log` now defaults to using an '%' symbol for parents of
+    unresolved merge conflicts. That includes unresolved conflicts
+    caused by e.g. `hg update --merge` and `hg graft`. '@' still takes
+    precedence, so when what used to be marked '@' still is.
+
  * New `conflictparents()` revset returns the commits that are being
    merged, when there are conflicts. Also works for conflicts caused
    by e.g. `hg graft`.
diff --git a/tests/test-backout.t b/tests/test-backout.t
--- a/tests/test-backout.t
+++ b/tests/test-backout.t
@@ -103,7 +103,7 @@
   |  date:        Thu Jan 01 00:00:02 1970 +0000
   |  summary:     grapes
   |
-  o  changeset:   1:22cb4f70d813
+  %  changeset:   1:22cb4f70d813
   |  user:        test
   |  date:        Thu Jan 01 00:00:01 1970 +0000
   |  summary:     chair
@@ -748,7 +748,7 @@
   |  date:        Thu Jan 01 00:00:00 1970 +0000
   |  summary:     capital three
   |
-  o  changeset:   0:a30dd8addae3
+  %  changeset:   0:a30dd8addae3
      user:        test
      date:        Thu Jan 01 00:00:00 1970 +0000
      summary:     initial
diff --git a/tests/test-graft-interrupted.t b/tests/test-graft-interrupted.t
--- a/tests/test-graft-interrupted.t
+++ b/tests/test-graft-interrupted.t
@@ -431,7 +431,7 @@
   $ hg log -GT "{rev}:{node|short} {desc}"
   @  6:6ec71c037d94 added x
   |
-  | o  5:36b793615f78 added foo to c
+  | %  5:36b793615f78 added foo to c
   | |
   | | o  4:863a25e1a9ea added x
   | |/
@@ -622,7 +622,7 @@
   $ hg log -GT "{rev}:{node|short} {desc}\n"
   @  4:2aa9ad1006ff B in file a
   |
-  | o  3:09e253b87e17 A in file a
+  | %  3:09e253b87e17 A in file a
   | |
   | o  2:d36c0562f908 c
   | |
@@ -669,7 +669,7 @@
   $ hg log -GT "{rev}:{node|short} {desc}\n"
   @  4:2aa9ad1006ff B in file a
   |
-  | o  3:09e253b87e17 A in file a
+  | %  3:09e253b87e17 A in file a
   | |
   | o  2:d36c0562f908 c
   | |
@@ -712,7 +712,7 @@
   $ hg log -GT "{rev}:{node|short} {desc}\n"
   @  4:2aa9ad1006ff B in file a
   |
-  | o  3:09e253b87e17 A in file a
+  | %  3:09e253b87e17 A in file a
   | |
   | o  2:d36c0562f908 c
   | |
diff --git a/tests/test-rebase-collapse.t b/tests/test-rebase-collapse.t
--- a/tests/test-rebase-collapse.t
+++ b/tests/test-rebase-collapse.t
@@ -762,7 +762,7 @@
   abort: edit failed: false exited with status 1
   [255]
   $ hg tglog
-  o  3: 63668d570d21 'C'
+  %  3: 63668d570d21 'C'
   |
   | @  2: 82b8abf9c185 'D'
   | |
diff --git a/tests/test-strip.t b/tests/test-strip.t
--- a/tests/test-strip.t
+++ b/tests/test-strip.t
@@ -598,7 +598,7 @@
   |  date:        Thu Jan 01 00:00:00 1970 +0000
   |  summary:     b
   |
-  o  changeset:   0:9ab35a2d17cb
+  %  changeset:   0:9ab35a2d17cb
      user:        test
      date:        Thu Jan 01 00:00:00 1970 +0000
      summary:     a
diff --git a/tests/test-update-branches.t b/tests/test-update-branches.t
--- a/tests/test-update-branches.t
+++ b/tests/test-update-branches.t
@@ -254,7 +254,7 @@
   |
   @  4:d047485b3896 0:60829823a42a  b1
   |
-  | o  3:6efa171f091b 1:0786582aa4b1
+  | %  3:6efa171f091b 1:0786582aa4b1
   | |
   | | o  2:bd10386d478c
   | |/