Someone

RRDs::graph($file,
            '--imgformat', 'PNG',
            '--width', $xpoints,
            '--height', $ypoints,
            '--start', "-$range",
            '--end', $end,
            '--vertical-label', 'msgs/min',
            '--lower-limit', 0,
            '--units-exponent', 0, # don't show milli-messages/s
            '--lazy',
            '--color', 'SHADEA#ffffff',
            '--color', 'SHADEB#ffffff',
            '--color', 'BACK#ffffff',
            '--slope-mode',

            "DEF:login=$login_rrd:login:AVERAGE",
            "DEF:mlogin=$login_rrd:login:MAX",
            "CDEF:dlogin=login,UN,0,login,IF,$step,*",
            "CDEF:slogin=PREV,UN,dlogin,PREV,IF,dlogin,+",
            "CDEF:rmlogin=mlogin,60,*",
            "LINE2:login#$color{login}:Logins        ",
            'GPRINT:slogin:MAX:total\: %8.0lf logins',
            'GPRINT:login:AVERAGE:avg\: %5.2lf logins/min',
            'GPRINT:rmlogin:MAX:max\: %4.0lf logins/min\l',

            "DEF:badlogin=$login_rrd:badlogin:AVERAGE",
            "DEF:mbadlogin=$login_rrd:badlogin:MAX",
            "CDEF:dbadlogin=badlogin,UN,0,badlogin,IF,$step,*",
            "CDEF:sbadlogin=PREV,UN,dbadlogin,PREV,IF,dbadlogin,+",
            "CDEF:rmbadlogin=mbadlogin,60,*",
            "STACK:badlogin#$color{badlogin}:Failed logins ",
            'GPRINT:sbadlogin:MAX:total\: %8.0lf logins',
            'GPRINT:badlogin:AVERAGE:avg\: %5.2lf logins/min',
            'GPRINT:rmbadlogin:MAX:max\: %4.0lf logins/min\l',

            'COMMENT:['.$date.']\r',
);