119 It has been said that a trading system can be very good for a certain security and may not be as good for other ones. For example, on Microsoft (MSFT), we have found (see the worksheet Riassunto) the following summary of performances of various trading systems: Security MSFT From 8/9/2010 To 8/11/2011 Days 367 Trading system Initial capital Final capital Number of operations Average investment Average duration of trades Yearly return (%) B&CB 200,000 200,668 9 4,000 28 17 Chande Kroll 200,000 199,814 5 4,000 48 −5 Envelops 200,000 200,112 2 3,000 99 4 SMA 200,000 200,475 17 4,000 15 12 EMA 200,000 200,439 12 4,000 22 11 KAMA 200,000 200,009 13 4,000 20 0 KAMA o 200,000 200,036 5 4,000 51 1 Parabolic Sar 200,000 200,146 19 4,000 13 4 WMAS 200,000 199,874 21 4,000 12 −3 So we have a good yield (17 % yearly) with B&CB, but there are very disappointing results with other trading systems. However, if we should want to make a quick swing trading, we should opt for the intersection of two SMAs that have a decent performance (12 %), but whose operations last only 15 days instead of 28. Summary of Part I