Since the conversation is now spreading to multiple platforms, I think it's necessary to make some distinctions here for those who are reading this but aren't familiar with the programs being discussed.
First of all, TS6 and Watcher clones are at total opposite ends of the spectrum. TS6 is a full-featured platform, with quotations, charting, news, level 2, executions, automation capabilites, etc. TS6 is more comparable to a full-featured platform like RealTick.
Watcher clones, on ther other hand, are copies of a seven-year old MS-DOS program that was only designed for executing orders and little else. If you want robust charting or other analytical features (and who doesn't?), you'll need an additional program for that, so you'll need to factor that cost in as well. Watcher-like software, although less sophisticated, is more comparable to IB's TWS software in that they are both geared primarily for executions.
Frankly, I don't understand why anyone would want to copy the Watcher. Sure, it was one of the first execution platforms available, but that hardly means its interface worthy of being cloned. I've used the Watcher on several occasions before and it never appealed to me at all. I find those scrolling tickers that say stuff like "INCA DROPS BID" to be totally worthless, especially on active stocks.
That reminds me. Is Watcher Technologies even in business anymore? They used to have a web site at
http://www.watchertech.com but it's been down for several months now.