Not sure why the equity curve is advancing so much at the end of 1013. Could it be bad data or something other ?

Here is an example.

It would be interesting to see what the equity curve looks like. Please attach a screenshot in PNG as suggested in reply #2, 2nd paragraph:

Eugene to mikesblack

Thanks in advance.

I need to figure out how to transfer a png file. Hope it's ok to send this now. It seems the system is referencing symbols without a price. Check out those profits on certain trades. Next, what is the solution? ITT shows a stock price of 240.00 in late 1995, but immediately displayed prices in the 20s after that. What can I do about this?

It seemed I needed to refresh my chart to correct the bad data. Now I am getting a "normal" equity curve.

Look for huge gaps (unhandled splits?) or bad data. If it's a missing split, right click the chart and choose "Process stock split". It's self-descriptive.

P.S. I'm avoiding PDFs and DOCs with screenshots anyway as I can't consider them a secure, comfortable and a correct way to handle snapshots. To transfer a PNG file, follow a few easy steps:

1. Hit PrtScrn key (press Alt to capture the active window)
2. Open the built-in MS Paint
3. Strike Ctrl-V
4. Crop optionally, then Ctrl-S and choose PNG

Exactly the same steps you take with your PDF application, whatever it is, with the benefit of clear images (not blurry).

I thought that I solved the problem, but as you can see AA has negative numbers. Then after I reload, the stock's price becomes normal. I did this yesterday, but for some reason there are one or two stock prices that become corrupted.
Please let me know if that png chart shows up.

I see the picture, thanks Mike. It makes me think that a Fidelity server you're connecting to has corrupt data for AAL. In the Data Manager, how do you have "Automatically update data on demand..."? I recommend disabling it and keeping the data up to date.

I don't have data on demand. BTW each corrupted stock is different each time I run the program. After I reload the problem data, there is no sign of corruption. I'm curious why this happens with this system and with different symbols.

Mike, I don't know. Probably your HDD is corrupt. Could be (although pretty unlikely) you're connecting to a Fidelity server returning broken data. A network issue if you still have on demand update enabled by mistake. May be you're doing something else in WLP that you don't show the forum. Or you have a virus.

Since this affects only your PC, try to figure out what's going on and find a clue. I'd start by switching to a different data provider, then system, changing settings, running WLP in a different Windows account, changing network connections, PCs, usage habits and so on until I'm onto something.

This is not my usual computer. I'll see if there is a difference when my main computer is returned.