Backtesting

Over the past few months I have downloaded several EOD databases from this forum and other places like the BSE NSE 2005 yahoo group / Bhav Copy Database etc

Now these being free databases they are not perfect. Some corporate actions have been adjusted some not. Its all done on a best effort basis (understandably its free).

But when you want to do some serious back testing these inconsistencies can make a huge difference.
One maladjustment can make a system look much better than it really is and vice-versa.

How should I solve this problem ?

• Buy data from somewhere if so please let me know who sells perfect data .
• Back test on existing DB and manually check each trade very laborious

I have tried manually adjusting the DB for Splits / Bonus but its too time consuming. Additionally I dont have anything to compare it against which I know is 100% correct.

Has anyone purchased data from NSE India site, is it any good. Also is it compatible with any common Technical Analysis programs I dont mind paying for good data.
Please let me know your thoughts.

Hi Neville_ed,

Allow me to represent ChartNexus.

ChartNexus is freeware, but it has an add-on module as XPertTrader with Backtesting function. You can compose your buy/sell logics graphically in the Rule Composers - we do not use scripting language.

You may see XPertTrader intro here:
http://www.chartnexus.com/support/tutorials/xperttrader/