diff --git a/power-report.py b/power-report.py
index 53726a9..ed92309 100755
--- a/power-report.py
+++ b/power-report.py
@@ -101,9 +101,25 @@ def window(series, lo, hi):
 
 
 def main():
+    global RES, GRAPHS
     ap = argparse.ArgumentParser()
     ap.add_argument("--tags", nargs="+", required=True)
+    ap.add_argument("--results", default=RES, help="results directory (default ./results)")
+    ap.add_argument("--label", action="append", default=[], metavar="TAG=NAME",
+                    help="friendly name for a tag in the comparison graph (repeatable)")
     args = ap.parse_args()
+
+    RES = os.path.abspath(args.results)
+    GRAPHS = os.path.join(RES, "graphs")
+    labels = {}
+    for spec in args.label:
+        if "=" in spec:
+            k, v = spec.split("=", 1)
+            labels[k] = v
+
+    def label(t):
+        return labels.get(t, t)
+
     os.makedirs(GRAPHS, exist_ok=True)
 
     data = {}
@@ -128,12 +144,12 @@ def main():
         t0 = pkg[0][0]
         cpu = d["cpu"] or "unknown CPU"
         fig, (ax1, ax2) = plt.subplots(2, 1, figsize=(11, 7), sharex=True)
-        for label, series, color in (("package W", d["pkg"], "#c0392b"),
-                                     ("core W", d["core"], "#e67e22"),
-                                     ("GPU W", d["gpu"], "#2980b9")):
+        for series_label, series, color in (("package W", d["pkg"], "#c0392b"),
+                                            ("core W", d["core"], "#e67e22"),
+                                            ("GPU W", d["gpu"], "#2980b9")):
             pts = [((t - t0) / 60, v) for t, v in series if v is not None]
             if pts:
-                ax1.plot([p[0] for p in pts], [p[1] for p in pts], label=label, color=color, lw=1)
+                ax1.plot([p[0] for p in pts], [p[1] for p in pts], label=series_label, color=color, lw=1)
         ax1.set_ylabel("power (W)")
         ax1.legend(loc="upper right", fontsize=8)
         ax1.set_title(f"power & thermal profile — {tag}\nCPU: {cpu}")
@@ -213,15 +229,15 @@ def main():
                 continue
             t0 = d["pkg"][0][0]
             pts = [((t - t0) / 60, v) for t, v in d["pkg"] if v is not None]
-            ax1.plot([p[0] for p in pts], [p[1] for p in pts], label=tag, color=color, lw=1)
+            ax1.plot([p[0] for p in pts], [p[1] for p in pts], label=label(tag), color=color, lw=1)
             tt = [((t - t0) / 60, v) for t, v in d["temp"] if v is not None]
             if tt:
-                ax2.plot([p[0] for p in tt], [p[1] for p in tt], label=tag, color=color, lw=1)
+                ax2.plot([p[0] for p in tt], [p[1] for p in tt], label=label(tag), color=color, lw=1)
         ax1.set_ylabel("package W")
         ax1.legend(fontsize=8)
         cpus = [data[t]["cpu"] for t in args.tags if data[t]["cpu"]]
         cpu_note = "  |  ".join(dict.fromkeys(cpus)) if cpus else "unknown CPU"
-        ax1.set_title(f"BEFORE vs AFTER — package power & CPU temp\nCPUs: {cpu_note}")
+        ax1.set_title(f"package power & CPU temp — {len(args.tags)} runs\nCPUs: {cpu_note}")
         ax1.grid(alpha=0.3)
         ax2.set_ylabel("CPU temp (°C)")
         ax2.set_xlabel("minutes from start")