Hi Nix,
Everything done offline, otherwise all settings will be overwritten with original MT4 configuration. Currently for Indonesian stock I have only daily data available from yahoo. Here I exported also manually data from one broker for hourly chart, there is possibility to connect MT4 to other real time data feeder.
If you want to trade for International Stock (US, Germany, UK) and free data feeder, I know you can use alpari or other broker which provide those data and trading facility.
Regarding DT_ssa, I found the mq4 version (no dll), I do not try if this is repainted or not. You may also convert the code into dll if you want to use it in NSDT.