hi all,
if may be annoyingly repeated, but database purity is very important to any FRUITFUL Technical analysis.
in NSE, securities are traded in different series. EQ & BE series must be enough for most of the people. so we would base our discussion based on this assumption. after downloading the EOD list from NSE, the EOD converter may use the logic that all series except EQ & BE are deleted before convertion. the EOD converter developed by pkjha of this forum has this facility to select EQ & BE series only. may be others also have this facility. for the differerent EOD converters & other software available at this forum, you may visit the link:
http://www.traderji.com/54514-post1.html
the next issue is symbols that have changed since the first day of your database. due to change in symbols, chart for each symbol is shown partially against the old symbol & the rest against the new symbol.
to know all the symbols presently in your database, you may run the AllMySymbols.AFL attached to this post. it will display all the symbols found inyour database. i have done this exercise on my database & the symbols found in my database are also attached as AllMySymbols.txt. a typical NSE symbol database of EQ & series will contain about 994 symbols as on date. (this number was amtching with karthik's database also, hense you may count on this number.)
HOW to run the AFL?
rename the AllMysymbolsafl.txt file to AllMySymbols.afl
Place the file AllMySymbols.afl in ...\Amibroker\Formulas\custom
Go to ANALYSIS >> Automatic Analysis
click on 'Pick' & select AllMysymbols.afl
select Apply to 'All symbols'
select Range 'All quotations
Press 'SCAN'
you will get the list of ALL symbols in your database, with the total number in the STATUS bar. you may export the list into a file & save if you like.
this number of total stocks in the database will give a rough idea of symbol changes & other imperfections in the database.
hope this write is useful. if you have any comments / suggestions, please post.
the procedure for incorporating changed symbols into Amibroker will be brought out in the next post.
all the best.
murthymsr
