justdata.com.au opinions?

Hi,

I'm just starting out building a strategy using amibroker for spread betting, I've spent some time investigating data sources for the LSE which include delisted stocks so that I can backtest and gain some confidence in what I'm attempting to do, and the best I can find is justdata.com.au.

Does anyone have any opinions good or bad on this data? It's quality etc. Anyone using it?

Dave

djped said:

Hi,

I'm just starting out building a strategy using amibroker for spread betting, I've spent some time investigating data sources for the LSE which include delisted stocks so that I can backtest and gain some confidence in what I'm attempting to do, and the best I can find is justdata.com.au.

Does anyone have any opinions good or bad on this data? It's quality etc. Anyone using it?

Dave

Click to expand...

The problem you'll have is that the SB companies prices will not be the same as the real market prices, therefore testing systems using real market data and then applying them to spreadbetting may not give you the outcome you expect.

okay, point taken, however I'm willing to risk that particular part, the prices may differ slightly, but they must follow the actual price pretty closely, if they didn't the SB companies wouldn't get any business?, my risks will be initially very low and the risk reward ratio will be 2:1 or 3:1 so as long as I can pick enough winners it should return a profit. I see the benefits of SB are that I can invest in anything using the leverage, and limit the risk to my stop distance etc.

I wouldnt assume it will always be close, this matter is dealt with at length on the following thread. Also SB companies will impose a minimum stop distance so you risk may be more than you think depending on timescale.

http://www.trade2win.com/boards/spread-betting/93554-igindex-requoted-already-closed-trade-20.html

yeah, point also taken, I'm aware that the price on the SB site isn't the price of the real asset, and that they can in fact make the price up (within reason), however I'd be limiting the risk to 1% or less of my equity so at most wouldn't be able to lose any more (with guaranteed stops, and yes I know they cost more also) and I'd also not take on positions where the risk was any more, minimum stop or not. I just prefer the idea at the moment to actually buying shares due to the relative inexpense, the quality of the trading platforms available and the 'tax free' element. I'm aware that my strategy even if tested will need to account for these other things, and some of which will be very difficult to account for, however I have some ideas, I can program a spread, and I can program some of the other stuff, in fact wiht amibroker I'm not sure there's anything you can't program. Anyway... back to the data? Whatever I do I want to be able to refer to a quality set of LSE data including delisted stocks, and preferable some other exchanges also, and not for the huge prices some places like CSI want to charge for that privilege!