Amibroker is a great charting program and costs about a tenth of metastock; it does all I need it to and more.
As for indicators, personally, I dont use them at all and would only ever use them for confirmation of trades or scanning for candidates to trade (not for triggers). I use price action and sound money management principles alone and that has worked in backtesting and for a few months live trading now.
I have nothing against Elder and know little of his triple screen system. Any system you have to pay for should be held in some contempt though I reckon. Elder is held in high regard though so at least we know hes not dodgy, whether to pony up the dosh for the system though....?