Hi Brian and David, thank you for your help. My question number 2 is solved thanks to your hints. The solution was that I had in the settings a commission per share selected. And because the Example.afl doesn't have a limit on how many shares can be bought together with the losses from the first two trades the account was wiped out very quick so that I only saw a few trades at the beginning while I saw many more if I selected Scan or show all trades. Great work.
Now I had the time to look again at the Yahoo data download. I found jswindle's Yahoo template which I downloaded and installed and then in Amiquote selected to download data from 1900 till today. The result seems to be the same wether I use the Yahoo template from jrswindle or the one from the Amibroker web page. You wanted to know which the symols were with the message: "Error during download. Yahoo! - 404 Not Found. Either symbol is incorrect or there is a problem with the data vendor's site" Here they are: ^NDA ^NFA ^NNA AAAB AAAC AACE AAGI AAGIW AAII ABANP ABBK ABBKP ABF ABFI ABGX ABJ ABMCW ABRI ABS AC ACAI ACAM ACBAW ACDO ACK ACLA ACNAF ACR ACRI ACRN ACTR AD ADEX ADIC ... I will stop here as there are many more. I can go manually through the list and delete all those symbols. I'm just surprised that jrswindles template, which is seen as THE template for yahoo, still has so many of those symbols in the list.
