About

Visualize, analyze and predict stock prices

Usage

Search and display stock prices and performance

Search for stocks in the search bar and plot their prices on the chart in a given time period

You can include up to 4 different stocks

The cards on the left side display some information about the stock performance. This includes three values:

Perf: This is simply the change in the stock's price between the beginning and the end of the time period. In other words, this is how much money can be made (or lost) by buying the stock at the beginning of the time period and reselling it at the end
Trading: This is the maximum performance that can be achieved (i.e. money that can be made) by trading in the time period with perfect knowledge of future prices
Short: This is the maximum performance that can be achieved by trading in the time period with perfect knowledge of future prices and the ability to short the stock

Trading view

Switching to trading mode in any of the cards turns on the trading view for the stock

In trading mode, the chart displays the detailed optimal trading strategy for that stock. Hovering on any stock's data point on the chart will show what the optimal action for that day is (e.g. to sell or to buy the stock), as well as the balance that results from that action, both for simple and short trading

Stock prices prediction

Coming soon!

Technical details

Data source

Stockcast uses the IEX Cloud API to retrieve financial data

Installation and setup

You will need to sign up with IEX Cloud and obtain an API token (yes, they do have a rather generous free access plan)

Running locally with mix in dev or sandbox mode

Dev mode runs against the real IEX Cloud production API, whereas sandbox mode runs against the IEX Cloud sandbox and doesn't consume your account's API calls, the downside being that the data is fake

Prerequisites:

Elixir >=1.10
Mix and Hex installed
Docker
Node 13.7.0

After having cloned the repository, do the following:

cp secret.template.exs dev.secret.exs
- Uncomment the lines in dev.secret.exs and replace #{YOUR_TOKEN_HERE} with your IexCloud production token
cp secret.template.exs sandbox.secret.exs
- Uncomment the lines in sandbox.secret.exs and replace #{YOUR_TOKEN_HERE} with your IexCloud sandbox token
Start the development database with: docker-compose -f apps/stockcast/docker-compose.yaml up -d

The following commands will execute in dev mode. If you want to run in sandbox mode the environment variable MIX_ENV should be set to "sandbox" (e.g. MIX_ENV=sandbox)

Setup the database:
- cd apps/stockcast
- mix ecto.setup
- cd ../../
Run mix fetch.symbols to fetch the list of available financial securities from IEX Cloud. This might take a while. The sets of securities that will be fetched is configured in config/config.exs unde Stockcast.IexCloud.Symbols as a list of API endpoints. This results in a total of about 75k securities being installed. You can modify the list, and you can work your way through the available API endpoints for financial symbols here.
Start the server with mix phx.server
In another terminal, build and start the single page web application:
- cd stockcast_spa
- nvm use to set the right node version to use (you might have to install, again using nvm)
- yarn
- yarn serve
Access the application at http://localhost:8080

Running with docker