better arguments management

src/main/java/fr/soleil/comete/bean/trend/view/CometeTrend.java

@@ -398,6 +398,7 @@ public class CometeTrend extends JFrame implements ITrendFileListener {
                 if (arg != null) {
                     if (COMMAND_HELP.equalsIgnoreCase(arg)) {
                         help = true;
+                        chartDetected = Boolean.FALSE;
                     } else {
                         filteredArguments.add(arg);
                         switch (argCount) {