The London Stock Market has roared to its best level in two years. To Stan Weinstein, publisher of the Professional Tape Reader, this is good news. Mr. Weinstein notes that the London market has an excellent history of leading the US markets. For this reason, as well as a host of others, Mr. Weinstein, one of the leading technical analysts of the market, remains bullish on the domestic market. He concludes that the probabilities continue to favor a bull market rather than a bear market "smash."