http://www.reddit.com/r/Bitcoin/comments/1c7ahh/we_are_mt_gox_ama/

[How does interest rate affect you?]

Check out "Interest Rates" tab on their site:

How does interest rate affect you?
Currency account USD balance
We pay you interest every day based on USD Buy interest rate, compounded daily.

Currency account BTC balance
We pay you interest every day based on BTC Buy interest rate, compounded daily.

Long BTC/USD position
We charge you USD Sell interest, and pay you BTC Buy interest every hour.

Short BTC/USD position
We charge you BTC Sell interest, and pay you USD Buy interest every hour.

Oh, and APY means "Annual Percentage Yield".

[What it does:]

I've made a small userscript that enhances my Bitcoinica experience, I thought that I could share it with others. I already covered it in a other topic, but now that I've added more functionality to it, I think it deserves it's own topic.

What it does:

- Adds the "zhoutonging price" (lowest price your position can handle before it gets liquidated) directly to the UI:



- Adds exchange value to your BTC and USD values when you hover your mouse over these:



- Enables all quick pick buttons, regardless of your balance. This is for quick picking a value to partly liquidate your position.

How to get it:

The script currently works in Firefox and Google Chrome.

Download this userscript: http://dl.dropbox.com/u/1127246/bitcoinica.user.js (current version: 1.2.2)
- Firefox: When you click on the link, a popup will appear. Wait for "Install" button to activate and click on it. Note: if the popup doesn't appear, it means you don't have Greasemonkey extension installed. You need to install it first to use this script.
- Google Chrome: Drag it onto your browser's window, then accept the installation.
Refresh Bitcoinica tab if necessary.

Happy trading!

In the light of recent events, I'd like to ressurect an idea I had a while ago to make BitMarket.eu even more secure - optional 2-factor auth. I was inspired by Google while thinking about this, because they implemented this with their Google accounts and I use it on a daily basis. And it works great. For those who don't know how Google's implementation work:

- First of all, this is all optional. You are not forced to use 2-step auth.
- When you enable 2-step auth, you have to authorize a device (your phone with special app on it) to use it
- Then, when you decide to log in, the device acts like a token (think SecureID from RSA) that gives you tokens valid for 30 seconds
- So to log in, you have to use BOTH your account password and a token from your authorized device
- There is a fallback mechanism for this - a list of one time passwords that you can print and hide somewhere safe. These will let you log in to your account and make some changes, should you lose or destroy your phone

So I'd like to ask you guys, what do you think of this? I'd like to mimic what Google does, with one exception - I don't want to make a native iOS/Android application, because it would take much time (and I don't own Android devices for testing it). Instead, I'd like to make a web application using HTML5 Local Storage, or even better, something like this to store the token seed. This way it could be platform independent and work for many more users.

I understand that this all could seem difficult and troublesome, but I guess for someone that has more than 10 Bitcoin on my (or your) website, this should be a must to protect his/her wealth.

Oh, and last thing. I am willing to do this work and open source it so every exchange/service can use it to make their website more secure.

[EasyBitcoin]

I saw one try to make easy wallet backup on the forums, but it lacked one thing - offsite backups.
Would there be a need for a service that backuped your wallet on the cloud? Before you scream "SCAM" and "FRAUD", read on:

- the app would be a complete package, wrapped around current Bitcoin client (-server option for communicating with it), so you wouldn't have to download two apps for one thing to do
- the app would make backups of your wallet every time it does change, so it would be always fresh
- then it would encrypt it on your computer with a strong algo and passphrase that you choose (it would enforce strong passphrases so newbies won't use "12345" or "password")
- then it would send the encrypted backup to the cloud (either on my server - with full backup history and easy reverting, or some public storage server, or to a FTP server you choose, or maybe somewhere else)
- it would allow you to quickly revert to a backup you choose
- it would work on major OSes (Windows, Linux, Mac)
- finally, it would be open source of course for full transparency of what it's doing.

What would you say about that?

Edit: Also, my rationale for this project is like this: I believe that Bitcoin has some chance to take off and be used by average Joe Smith. But the wallet backup is a problem that's above average Joe. Especially understanding that you need back it up every 100 transactions or less. So "normal" people would be confused about it and probably feel unsafe about the whole proccess, thus choosing to not use Bitcoin. The service I'm talking about is all about simplifying the backup for average Joe to make it fully transparent for him, still providing decent security for him and for power users.

Edit 2: Codename: EasyBitcoin

Hi all,

I want to share with you with a little service I created today. It's called Bitcoin Signature Generator, and it's for generating signatures like the one you can see below this post. Just click on it and see what it does.

Why on the earth one would want to make one? Well, there are several reasons for this:

- you want to remember where exactly you've used your Bitcoin address
- you want to have control over the address once you left it somewhere
- you want to know how many people used your address (not neccesarily paid, but just looked at it)
- you want to attract more people to donate/pay you because you do some great stuff with Bitcoin
- etc.

That are some of the reasons I've built BSG. Right know it's in "beta" stage - not entirely tested, but proven that it works. It does not have full functionality that I wanted it to have, but if you'll like it, I want to add following things to it:

- more control over the visual stuff - background color, font color, icon on the left
- more editing options to existing signatures
- configurable message that would show up for your visitors/customers on the signature page
- multi-language support, especially for signature page
- more, whatever you think of...

To use the service, it's required that you make an account. It's free and quick (no activation links over mail, no entering your personal stuff) and I require it to make it easier for you to manage your signatures.

I'll try hard to make it better if you decide to use it and keep it always online, so your signature will be always visible. The service itself is free, though I encourage you to donate some bitcoins to help keeping it running. You can use my address from the sig for this .