Have any used it for graphs (histograms)

Umm.. if it's two questions here, answer to topic's question is "portlist" command in shell while program is running. For graphs I haven't used it.

Ram Disk:> portlist
Address Name Signal Task TaskName
------------------------------------------------------------------------------------------------------
0x20A21B68 ConClip.rendezvous 31 0x20DAB5E0 « ConClip »
0x200824D0 SkinManager.rendezvous 31 0x20079738 «Skin Manager »
0x20286220 cybergraphics.library 31 0x20285020 cybergraphics.library
0x2057F478 HIDCTRL.1 28 0x208A0CB0 hid.class Control GUI
0x20585EF8 HIDCTRL.2 28 0x208A2DB8 hid.class Control GUI
0x2058C898 HIDCTRL.3 28 0x20291180 hid.class Control GUI
0x206BF870 lowlevel.library 255 0x0
0x2077BC08 HIDCTRL.4 28 0x20725448 hid.class Control GUI
0x20784468 HIDCTRL.5 28 0x20743130 hid.class Control GUI
0x2078AFE8 HIDCTRL.6 28 0x2075C7F8 hid.class Control GUI
0x202E3430 REXX 30 0x20F89040 RexxMaster
0x20DC20B0 AREXX 31 0x20F89040 RexxMaster
0x20FC6C78 TP8DriverServerPort 31 0x20FC3690 Background CLI
0x220114D8 WSH_Completer_V2 31 0x2200ED20 WSH_Completer_V2
0x220FA698 POPO.1 26 0x220E51B8 PoPo (Poseidon Popups)
0x220469A0 Ambient IPC 25 0x20885518 Workbench
0x206C1590 AMBIENT 23 0x20885518 Workbench
0x21F56A28 MIXER 28 0x21F47428 Mixer
0x215B5EA0 NETSTACK 30 0x215B4350 NETTRACE
0x215B5ED0 AMITCP 29 0x215B4350 NETTRACE
0x23105E3C inetd.ipc 30 0x221E7310 MOSSYS:Net/INetD
0x285FDA08 OWB.1 26 0x286CA430 OWB
0x28BD45E8 SKETCH.1 27 0x28D8BD98 Sketch
0x2A01DB30 MCON.1 24 0x284CFD48 « MUI Console Server »
0x20003DF0 _The Enforcer_ 0 0x0
Ram Disk:>


SKETCH.1 AT PORT 27

Now to write a short and dirty arexx script to test the port.

Port name is SKETCH.1 and that should be used in scripts.