Hi, I am having a problem with my Amibroker 4.80 installed software. I added a new database using yahoo free data from 1980-present, and I use an old db which is also from yahoo free data. The backtests are generating differect trades now depending on the data being used.
Can anyone explain why this is occuring on multiple stocks? Thanks, Eric Old Database works fine: Ticker Trade Date Price Ex. date Ex. Price % chg Profit % Profit Shares Position value Cum. Profit # bars Profit/bar MAE MFE Scale In/Out Initial risk $ R-Multiple VLO Long (max loss) 1/2/2001 8.89439 1/5/2001 7.83583 -11.90% -775.67 -11.95% 730 6492.91 -775.67 4 -193.92 -15.33% 2.02% 0/0 649.29 -1.19 VLO Long 2/7/2001 8.89081 3/13/2001 9.15781 3.00% 189.36 2.96% 720 6401.38 -586.31 24 7.89 -4.56% 7.76% 0/0 640.14 0.30 VLO Long (max loss) 5/11/2001 11.7763 6/14/2001 10.1556 -13.76% -877.34 -13.80% 540 6359.22 -1463.65 24 -36.56 -13.89% 7.08% 0/0 635.92 -1.38 VLO Long (max loss) 4/1/2002 11.9591 4/24/2002 11.1162 -7.05% -448.84 -7.08% 530 6338.33 -1912.48 18 -24.94 -7.05% 0.00% 0/0 633.83 -0.71 VLO Open Long 11/3/2003 10.4867 6/8/2006 58.62 459.00% 28877.60 458.96% 600 6292.00 26965.12 655 44.09 -0.73% 574.67% 0/0 New Datbase with error: Ticker Trade Date Price Ex. date Ex. Price % chg Profit % Profit Shares Position value Cum. Profit # bars Profit/bar MAE MFE Scale In/Out Initial risk $ R-Multiple VLO Long (max loss) 1/2/2001 8.88399 1/5/2001 7.82592 -11.91% -775.31 -11.95% 730 6485.31 -775.31 4 -193.83 -15.34% 2.02% 0/0 648.53 -1.20 VLO Long 2/7/2001 8.88112 3/19/2001 8.21925 -7.45% -479.43 -7.50% 720 6394.41 -1254.74 28 -17.12 -9.18% 7.76% 0/0 639.44 -0.75 VLO Long 4/9/2001 9.14245 5/8/2001 10.2592 12.21% 778.92 12.17% 700 6399.72 -475.82 21 37.09 -0.03% 28.76% 0/0 639.97 1.22 VLO Long 5/11/2001 11.7665 5/31/2001 10.7882 -8.31% -530.47 -8.35% 540 6353.92 -1006.29 14 -37.89 -8.57% 7.01% 0/0 635.39 -0.83 VLO Long (max loss) 4/1/2002 11.9389 4/24/2002 11.1062 -6.97% -443.47 -7.01% 530 6327.64 -1449.76 18 -24.64 -7.00% 0.00% 0/0 632.76 -0.70 VLO Long 11/3/2003 10.4766 8/6/2004 16.6806 59.22% 3781.98 59.18% 610 6390.74 2332.22 191 19.80 -0.73% 86.00% 0/0 639.07 5.92 VLO Long 11/17/2004 21.0943 1/6/2005 20.9296 -0.78% -52.30 -0.80% 310 6539.24 2279.92 35 -1.49 -3.07% 12.53% 0/0 653.92 -0.08 VLO Long 1/14/2005 23.304 4/18/2005 33.1954 42.45% 2768.48 42.43% 280 6525.11 5048.39 64 43.26 -0.77% 74.75% 0/0 652.51 4.24 __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com ------------------------ Yahoo! Groups Sponsor --------------------~--> Everything you need is one click away. Make Yahoo! your home page now. http://us.click.yahoo.com/AHchtC/4FxNAA/yQLSAA/GHeqlB/TM --------------------------------------------------------------------~-> Please note that this group is for discussion between users only. To get support from AmiBroker please send an e-mail directly to SUPPORT {at} amibroker.com For other support material please check also: http://www.amibroker.com/support.html Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/amibroker/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
