17 votes

Anyone know of an API I can get historical price time series for multiple coins

I am developing the ccxt cryptocurrency trading library, check it out on GitHub: https://github.com/kroitor/ccxt It is a library for cryptocurrency trading and e-commerce with support for many ...
Igor Kroitor's user avatar
17 votes
Accepted

Where is the BTC price "stored"?

There is no "the" BTC price. There are exchanges, where people offer to sell and buy BTC for USD and other currencies, at certain prices. Those exchanges generally report the last price at ...
Pieter Wuille's user avatar
15 votes
Accepted

How do I get bitcoin price without any external source?

The bitcoin price is determined by a free market of buyers and sellers. There is no way to calculate the price on your own without an external source. I suppose the only exception to this would be if ...
m1xolyd1an's user avatar
  • 5,646
14 votes

Why does my bitcoin "to US dollar" worth change when the stock market is closed?

To my knowledge, bitcoin is not traded on any stock markets. It is traded directly on exchanges specialized in cryptocurrencies. These exchanges don't necessarily close, and therefore trades are ...
Jestin's user avatar
  • 8,812
11 votes

Why does my bitcoin "to US dollar" worth change when the stock market is closed?

Bitcoin is not a stock. It's a decentralized currency and its markets are open 24/7.
Murch's user avatar
  • 75.4k
9 votes

Generating a Bitcoin Address QR code with current USD price embedded?

You can't include the USD amount, but you certainly can include the btc amount in the QR code. The QR code essentially embeds a text like this: bitcoin:1ArmoryXcfq7TnCSuZa9fQjRYwJ4bkRKfv?amount=0.005 ...
Jimmy Song's user avatar
  • 7,759
9 votes

How do I get bitcoin price without any external source?

You may be thinking with cause and effect reversed. The Bitcoin price being $300 does not cause people to buy and sell at $300. Rather, people buying and selling at $300 causes the price to be $300. ...
user253751's user avatar
8 votes

Do I have to buy a full bitcoin to get the price increase?

If you have 0.1 BTC and the Bitcoin price is $10,000, it is worth $1000. If the Bitcoin price becomes $20,000 you will still have 0.1 BTC but it will be worth $2000.
Tailer's user avatar
  • 3,669
7 votes

Where can I get all historical trades BTC price data?

You might want to try http://www.cryptodatasets.com/ It has free raw data and sampled data from Bitfinex and HitBtc (currently). P.S. it's my website
MegaHotel's user avatar
  • 151
7 votes
Accepted

Anyone know of an API I can get historical price time series for multiple coins

Found the data on crypto compare const endpoint = 'https://min-api.cryptocompare.com/data/histoday?aggregate=1&e=CCCAGG&extraParams=CryptoCompare&fsym='+ ticker.toUpperCase() +'&limit=...
Vinnie James's user avatar
5 votes

How does bitcoin conversion (to/from $) handle round off error?

The Bitcoin protocol doesn't recognize the concept of a dollar. Conversions of the kind you mention do not exist in the Bitcoin protocol. Conversions might exist with services that recognize dollars (...
Meni Rosenfeld's user avatar
5 votes

Anyone know of an API I can get historical price time series for multiple coins

http://www.cryptocoincharts.info Advance API to more than 100 exchanges: cryptocurrency pricing, OHLC and volume data from multiple exchanges. BTC38, BTCC, BTER, Bit2C, Bitfinex, Bitstamp, Bittrex, ...
Gilgi's user avatar
  • 59
5 votes

How do exchanges keep relatively similar price on coins?

If I could buy a bitcoin on Exchange A for $2,000, turn around and immediately sell it on Exchange B for $2,500, and make an immediate profit of $500, I would do that all day long, and get rich! But ...
abelenky's user avatar
  • 1,344
3 votes
Accepted

How can a X-coin market cap go down while its value goes up?

As Nate Eldredge pointed out, the chart you're looking at is denominated in BTC, while the market cap is denominated in USD. If you look at the chart below, you'll see that the price in USD (green) ...
Murch's user avatar
  • 75.4k
3 votes
Accepted

Is there a calculation for exchange rate stability?

This site can help you calculate the beta of Bitcoin: https://btcvol.info/ "What definition of volatility does btcvol.info use? The standard deviation of daily returns for the preceding 30- and 60-...
Logan's user avatar
  • 373
3 votes

Need authoritative source for historic Bitcoin conversion prices from all exchanges

Many API endpoints included OHLC data from various exchanges can be found on cryptowatch cryptocompare
Petr Javorik's user avatar
3 votes
Accepted

Are price movements of Bitcoin and altcoins inversely coupled?

The idea that bitcoin rising leads to altcoins falling is an unproven hypothesis, it is something that traders have noticed, but due to the various flaws in human observation, we cannot say for ...
brandondoge's user avatar
3 votes
Accepted

Electrum shows "No FX rate available" and balances show "No Data" and last transaction doesn't appear

I've just had this problem as well. It looks like Electrum gets its currency information by default from the BitcoinAverage website. You could try to select a different source of information. Try and ...
jvpernis's user avatar
  • 146
3 votes

Can an altcoin be worth less than 1 satoshi (0.00000001 BTC)?

Can an altcoin be worth less than 1 satoshi (0.00000001 BTC)? Yes Is this a reasonable position? No
amaclin's user avatar
  • 6,770
3 votes
Accepted

How Do I Calculate the profit of the value of my bitcoin?

The simplest way to calculate would be: averagecost = ((BTC[t0] x USD[t0]) + (BTC[t1] x USD[t1]) + (so on))/total_BTC where t0,t1 and so on are different time when you bought. The above gives you ...
remedcu's user avatar
  • 1,093
3 votes

do you think bitcoin futures exchanges (CBOE/CME) are a positive or negative for bitcoin price and why?

I do not consider the Futures Exchanges to be a good thing. I don't trust large institutional traders. They can and will manipulate prices in their favor. I believe they are currently running up ...
abelenky's user avatar
  • 1,344
3 votes

BTC/USD price changes approximately the same way over many exchanges at the same time, how?

To be more specific about the "arbitrage strategies" in Tanmay's answer: Suppose there were a difference in price between two exchanges: at A the price is $10,000 and at B it is $10,100. Then, in ...
Nate Eldredge's user avatar
3 votes
Accepted

What is QuoteAssetVolume and BaseAssetVolume?

baseAssetVolume is the quantity shown as the amount of coins received by the buyer whereas the quoteAssetVolume is the amount paid by the payer
Saxtheowl's user avatar
  • 2,800
3 votes
Accepted

What would happen when everybody decides to convert their BTC to cash?

In order for you to sell your BTC for fiat cash, another trader needs to be on the other end of that deal and be willing to buy your BTC in exchange for their fiat cash. So as long as someone is ...
ieatpizza's user avatar
  • 2,068
3 votes
Accepted

How are crypto prices calculated by an exchange? Example game in a spreadsheet to illustrate

Exchanges don't calculate prices, they report them. They aggregate people who want to sell and people who want to buy and report the prices they are willing to buy and sell for. When one person is ...
David Schwartz's user avatar
2 votes

Where can I get historic data series of Bitcoin prices?

You might want to try http://www.cryptodatasets.com/ It has free raw(every trade by trade) data and sampled data from Bitfinex and HitBtc (non from MtGox since its not operating anymore). P.S. it's ...
MegaHotel's user avatar
  • 151
2 votes

Where can I get historic data series of Bitcoin prices?

You didn't state what format you are looking for. Investing.com has a decent tool for this. I've used it for calculating long term gains/losses. https://www.investing.com/currencies/btc-usd-...
m1xolyd1an's user avatar
  • 5,646
2 votes
Accepted

Generating a Bitcoin Address QR code with current USD price embedded?

However it is possible to generate a bitcoin QR code with a given value in USD, but it is no use since high transaction fees and highly volatile nature of bitcoin. Still, you can use third party ...
Hashim Taylor's user avatar
2 votes

Why is Bitcoin gaining value while so many other cryptocurrencies are not?

There is this classic bootstrapping problem. To make a successful cryptocurrency it needs: Miners (so that it's secure) Users (to attract miners, users also want it to be secure) Value (to attract ...
smatthewenglish's user avatar
2 votes
Accepted

With the upcoming hard fork will there be a fixed exchange rate between Bitcoin Unlimited and Bitcoin?

If the two projects both persist, they would be freely traded one for the other. A fixed price could only be established if someone with unlimited funds guaranteed an exchange rate, which naturally ...
Murch's user avatar
  • 75.4k

Only top scored, non community-wiki answers of a minimum length are eligible