The best replacement for metastock is tradestation.

The best alternatives to metastock are rated as following:
★★★★★  tradestation
★★★★  amibroker
★★★  esignal
★★  ninjatrader
★  tc 2000
★  metatrader
★  chartnexus
★  omnitrader
★  vectorvest
★  telechart
★  tc2000
★  multicharts
★  advanced get
  ninja trader
  bullcharts
  wealth lab
  sharescope

Your alternative for metastock is not listed? Suggest!
Speaking about metastock, one probably shouldn't forget about esignal.

Other search terms related to metastock and their ratings are:
★★★★★ esignal
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metastock
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