With share prices passing a four-year high - and set to rocket even more in 2006 - a stocks and shares website, founded in Tenby, expanded this week to help people in West Wales to take advantage of the national rush to buy shares. Sharecrazy.com, with an office in Crackwell Street, overlooking the harbour, has merged with InvestorEase, one of the most successful share websites in the UK.  Malcolm Stacey, director of Sharecrazy.com, and a former BBC Radio 4 presenter, said: "Our aim is to help ordinary people from South Wales to take advantage of the big surge in share prices expected by many in 2006. "From small beginnings we've become one of the most popular share trading internet sites in the UK. As far as I'm aware, we're the only which was founded here in Wales. "Now that shares have reached very high levels, and many more ordinary people have started to show better returns, everyone seems to want to try their luck again; so we decided to expand to meet the increased demand."  Malcolm founded Sharecrazy. com with aid of Alan Green, one of the country's leading marketing experts, who first became interested in shares after reading Malcolm's best selling book - Armchair Tycoon. "With the expert help of the IvestorEase team," said Malcolm, "we now have an extremely fast and friendly website with almost everything  a beginner or an experienced armchair investor needs to know before buying or selling a share."  Sharecrazy. com has negotiated its own cut-rate commission rates as its run by share traders (like Malcolm) for sharetraders. Said Malcolm: "We try to cut out the business jargon to make share trading fun. Everyone can do it. We've made the site really easy to zip around. Though of course shares can go up as well as down, the trend now is definitely up."