Yes very different results indeed. In reality if you were long DUG and the next day the price fell $6 and you were paid $6 per share in your account, you lost nothing, which is what happened to owners of DUG. If the data showed a $6 drop, then the backtest is flawed.
--- In [email protected], "droskill" <drosk...@...> wrote: > > Telechart smoothed the data and the dividend, and the price change, does not > show up. Now imagine you had a stop in place under DUG at 3%. In the > backtest, you remain long the stock. In reality, you're stopped out. Very > different results. > > --- In [email protected], "booker_1324" <booker_1324@> wrote: > > > > > > droskill, > > > > I wish to address your statement on Telechart about "Major problem - the > > API to access the data via AB doesn't adjust for splits or dividends. This > > basically, from my point of view, makes it useless for backtesting." > > > > Telechart already has all of it's data adjusted so there is no need for AB > > to adjust for splits or dividends. > > > > For example, take symbol DUG which is an ultra-short oil & gas fund. > > During Q4 of 2008 this fund had a remarkable net income result due to > > investments internal to the fund. On Dec 22 it was trading about $35, but > > after a $6 dividend payout the next day it opened around $29, a massive > > change. You can verify this by looking at historical charts at your > > favorite internet stock quote site, many of which show unadjusted data. > > But Telechart data has been backwards adjusted for this change, so the data > > is smooth all the way back in time, and you won't see a big price change > > when a big payout occurs. It may take a week or so for your fund data to > > be adjusted following a payout, but they will get it done. Take a look at > > DUG in TeleChart at the end of December 08, and you'll see no $6 gap down. > > > > On the contrary, I find Telechart data excellent and have used it for daily > > backtesting for several years along with DTN IQfeed as a complement for > > intraday data. > > > > --- In [email protected], "droskill" <droskill@> wrote: > > > > > > I've been spending a bit more time with Quotes Plus - pretty good data > > > feed, but there are issues: > > > > > > - No lists of the stocks making up S&P500 or other key indices (they do > > > have Nasdaq and NYSE). This means if you use the S&P, for instance, for > > > looking % of stocks above a moving average, you're going to have to > > > manage the lists yourself. > > > - Has fundamentals - this is useful, and the data feed can be used with > > > more fundamentally-oriented scanning software such as HGSI. > > > - Has a ton of indices - gold/silver/oil, etc as well as put/call > > > indices, etc. Premium may have the put/call as well - I'd have to take a > > > look. > > > > > > On Premium Data: > > > - Fantastic folder breakdown of industries and indices. So, running a > > > scan over the stocks in the S&P 500 or the S&P 1500 is simple, and will > > > not require maintenance from you. > > > - Lacks some basic useful indices out of the box - like those mentioned > > > above (oil/gold/etc). > > > - No fundamental data. > > > - Great ETF breakdowns into different categories. > > > > > > Telechart: > > > - Includes access to their online stock tool freestockcharts.com > > > - Includes fundamentals > > > - Lots of indices and special, TC-only indices like T2106 etc. > > > - Major problem - the API to access the data via AB doesn't adjust for > > > splits or dividends. This basically, from my point of view, makes it > > > useless for backtesting. > > > > > > That's what I've got right now - to me it's a toss up between Quotes Plus > > > and Premium. > > > > > > --- In [email protected], "droskill" <droskill@> wrote: > > > > > > > > I think the only other vendor worth looking at is Quotes Plus - just my > > > > opinion. Anybody have a comparison of the two that has experience with > > > > both? From my limited experience, QuotesPlus has a bit more extensive > > > > indices, but Premium has it on organization. > > > > > > > > --- In [email protected], "louies88" <Louies88@> wrote: > > > > > > > > > > > > > > > > > > > > --- In [email protected], "patsgreatdeals" <patsgreatdeals@> > > > > > wrote: > > > > > > > > > > > > Is there a plugin for AMIBroker? for premiumdata.net? > > > > > > > > > > > They don't have a plugin in the truest sense, but they have a little > > > > > program that you must install. It has all the necessary structure and > > > > > very well integrated to Amibroker. Everyday you just update the data > > > > > via this little program and...voila...they're updated in your AB > > > > > database. > > > > > > > > > > Premiumdata.net is very extensive and very good, especially in the > > > > > sector indices. If you're a top-down analyst, you'll like their > > > > > sector index break down. It's very comprehensive. The update, by the > > > > > way, is very very quick compared w/ Amiquote or any other service > > > > > that relies on Yahoo data. > > > > > > > > > > > > > > >
