Stack Overflow
Stack Overflow

Questions tagged [stocks]

313 questions
12
votes
1 answer

correlation error: 'x' must be numeric

I have a XTS dataset that contains many stock closing prices called: dataset. I then wanted to find if their returns have any correlation via cor() , however I get an error message: Error in cor(RETS) : 'x' must be numeric. Here is what i have…
Jason
  • 311
  • 1
  • 4
  • 14
11
votes
3 answers

Building a stock market trading game in RoR, what libraries are available?

I'd like to build a relatively simple online stock trading application (in RoR). It would just be a game so no real trades- just an online simulation based on real market data. A good example being http://www.wallstreetsurvivor.com/ or…
digitalWestie
  • 2,647
  • 6
  • 28
  • 45
11
votes
2 answers

Geometric Brownian Motion simulation in Python

I am trying to simulate Geometric Brownian Motion in Python, to price a European Call Option through Monte-Carlo simulation. I am relatively new to Python, and I am receiving an answer that I believe to be wrong, as it is nowhere near to converging…
tgood
  • 129
  • 1
  • 2
  • 7
11
votes
2 answers

Protocols used by stock exchanges

My career goal is to work as a software developer for an online stock broker website or for a stock exchange. I am curious about the protocols used by the stock network. For example, what protocol does an online stock broker website use to send a…
HideYourLoveAway
  • 163
  • 2
  • 6
11
votes
4 answers

Are document databases good for storing large amounts of Stock Tick data?

I was thinking of using a database like mongodb or ravendb to store a lot of stock tick data and wanted to know if this would be viable compared to a standard relational such as Sql Server. The data would not really be relational and would be a…
dvkwong
  • 543
  • 2
  • 4
  • 12
11
votes
8 answers

Where can i find sample alogrithms for analyzing historical stock prices?

Can anyone direct me in the right direction? Basically, I'm trying to analyze stock prices and see if I can spot any patterns. I'm using PHP and MySQL to do this. Where can I find sample algorithms like the ones used in MetaStock or thinkorswim? I…
user126284
11
votes
3 answers

How to Access Yahoo Finance YQL query with historical data

I'm new to YQL. Perhaps this is very trivial, but I couldn't quite figure this out. I know, for instance, how to query current stock data from Yahoo/YQL using the YQL console: http://developer.yahoo.com/yql/console/ with the query string: select *…
user780069
  • 431
  • 2
  • 5
  • 6
10
votes
1 answer

Python Finance: How to use macd indicator for signals strategy?

I am trying to get my head around stock data and it's implementation in python. In starting I am using MACD indicator in Python stockstats library. Thing I want to know, if I have 100 OHLC entries of a certain stock, how can I use MACD output to…
Volatil3
  • 14,253
  • 38
  • 134
  • 263
10
votes
3 answers

looking for an intraday stock quote feed

I have an application which needs to get intraday stock quotes on several assets (indices, commodities etc'). I want to be able to query the data in HTTP and get it as CSV/XML format. Now, I'd like to be able to ask the data provider for example…
Poni
  • 11,061
  • 25
  • 80
  • 121
10
votes
2 answers

Calculate RSI(Relative Strength Index) using some programming language (JS/C#..)

I am working to calculate RSI (Relative Strength Index). I have data like this **Date|Close|Change|Gain|Loss** The formula for calculating this is RSI = 100 - 100/(1+RS) where RS = Average Gain / Average Loss Source So I want to calculate via some…
Blu
  • 4,036
  • 6
  • 38
  • 65
9
votes
1 answer

Broker that supports both ISA accounts and API access?

I'm looking for a stockbroker but can't seem to find one that 'ticks all the right boxes' - can anyone help please?! The essential requirements are: Supports Shares ISA accounts Access to ETFs on the LSE, especially iShares Real-time price…
Paul
  • 91
  • 2
9
votes
3 answers

How can I implement a stock volume chart using core plot on iPhone?

I'm writing a stock charting application on iPhone using core-plot. What kind of chart should I use to plot the volume chart? Since I will also need to overlay the price charts onto the volume chart, how should I go about doing this? Here's an image…
futureelite7
  • 11,462
  • 10
  • 53
  • 87
8
votes
1 answer

Stock Market API - Top Gainers/Losers

I'm looking for a free API which I can use to retrieve the stock market's top gainers and top losers for the current day. I've checked out Google and Yahoo's API's and they don't seem to do this. I can get price quotes on specific stocks, but…
Brandon Montgomery
  • 6,924
  • 3
  • 48
  • 71
8
votes
4 answers

Automating Etrade

Hey everyone, I was wondering how would I start programming an interface to trading stocks in Etrade in python. I am attempting to make an automated trading bot, but there is no api publicly available for automated trading with Etrade. Thanks in…
iAlexTsang
  • 189
  • 2
  • 10
8
votes
2 answers

Is there a way to automatically get general info of many stocks like P/E ratio, Yield, and so on?

I know some ways to get daily stock prices and volumes in R or python, but just wondering whether these is a way (using either R or python) to get more info about stocks such as P/E ratio, company website, Yield and so on, preferably not just…
danioyuan
  • 1,268
  • 2
  • 13
  • 16
1
2
3
…
20 21