DCA Coinbase, Ftx, Gemini

Automated dollar cost averaging for BTC, LTC, BCH and ETH on Coinbase. Inspired by https://github.com/blampe/dcagdax Added the following features

• automatic deposits
• fixed ledger api dependency package. Had to move the package inside as well
• added percentage buys
• added force flag to buy now regardless of the window check, will ask for confirmation
• added after flag
• added support for geminit and ftx/ftx.us exchanges
• added limit order type support
• added some unit tests

Note Ftx and Gemini do not support funding over api at the moment. Autofund periodically manually if you plan to use those exchanges. Ftx and Gemini do not support market order type. Use limit order type with the following flags to successfully execute trade.

--type limit
--spread % to increase ask price to accommodate possible price fluctuation when order is placed. Default: 1
--fee % for exchange commission typically 0.1-0.5 for most exchanges depends on fee exchange and fee tier. Default 0.5

Limit order may spend a little less every purchase to accommodate spread and fee. Unused portion will be left on exchange and included into a next order.

Setup

If you only have a Coinbase account you'll need to also sign into Coinbase. Make sure you have a bank account linked to one of these for ACH transfers.

Procure a Coinbase API key for yourself by visiting https://pro.coinbase.com/profile/api. Do not share this API key with third parties!

Usage

Build the binary:

$ go build -o .  ./...

Then run it:

./dcagdax --help
usage: dcagdax --every=EVERY [<flags>]

Flags:
  --help                 Show context-sensitive help (also try --help-long and--help-man).
  --exchange="coinbase"  Exchange coinbase, gemini, ftx, ftxus. Default: coinbase
  --coin=BTC             Which coin you want to buy: BTC, LTC, BCH or ETH : percentage amount. Can be split between multipe coins. Total must be 100%. Example --coin BTC:70 --coin ETH:30
  --every=EVERY          How often to make purchases, e.g. 1h, 7d, 3w.
  --usd=USD              How much USD to spend on each purchase. If unspecified, the
                         minimum purchase amount allowed will be used.
  --currency="USD"       USD, EUR etc
  --until=UNTIL          Stop executing trades after this date, e.g. 2017-12-31.
  --after=AFTER          Start executing trades after this date, e.g. 2017-12-31.
  --trade                Actually execute trades.
  --autofund             Automatically initiate ACH deposits.
  --force                Force trade despite trading windows, will ask for user confirmation
  --type="market"        Order type market, limit. Default: market
  --spread=1.0           Percentage to add above ask price to get limit order executed. Default: 1.0
  --fee=0.5              Fee level to exclude from limit order amount. Default: 0.5
  --version              Show application version.

Run the dcagdax binary with an environment containing your API credentials: For Coinbase

$ COINBASE_SECRET=secret \
  COINBASE_KEY=key \
  ./dcagdax --help

For Gemini

$ GEMINI_SECRET=secret \
  GEMINI_KEY=key \
  ./dcagdax --help

For Ftx/Ftx.us

$ FTX_SECRET=secret \
  FTX_KEY=key \
  ./dcagdax --help

Be aware that if you set your purchase amount near 0.01 BTC (the minimum trade amount) then an upswing in price might prevent you from trading.

Run in Docker

The application can run in docker with cron. Create env file with the following format

COINBASE_SECRET=secret
COINBASE_KEY=key

Adjust cron.conf as you wish. Note this will run the cointainer in foreground. To detach: Ctrl+P+Q Timezone is optionalal -e TZ=... and added for convenience by default cron will run in UTC timezone

docker build -t dcagdax .
docker run -t -i --name dcagdax -e TZ=America/Los_Angeles  --env-file .env dcagdax

Run docker with automatic start

docker run -d --name dcagdax -e TZ=America/Los_Angeles  --env-file .env --restart unless-stopped dcagdax

Follow container output

docker logs dcagdax --follow

To stop and and remove

docker stop dcagdax
docker rm -f dcagdax

FAQ

Q: Why do I not see any trading activity from the bot?

A: If you have other BTC trades on your account, the bot will detect that as a cost-averaged purchase and wait until the next purchase window. This is for people who want to "set it and forget it," not day traders!

Q: Why would I use this instead of Coinbase's recurring purchase feature?

A: The fees on recurring purchases (currently a minimum of $2.99 per purchase!) can add up quickly. This side-steps those costs by automating free ACH deposits into your exchange account & submitting market orders to exchange with BTC.

Q: How should I deploy this?

A: You could run this as a periodic cronjob on your workstation or run inside docker container or in the cloud. Just be sure your API key & secret are not made available to anyone else as part of your deployment!

Q: Which coins can I purchase?

A: We support all of Coinbase's products: BTC, LTC, BCH and ETH.

Q: Can I buy you a beer?

A: BTC 1KZhfEWkwH8A7L1Dm9MoHwUKkrEEHrFjgB

Development references

Unit tests

Generate mocks

go generate ./...

Run unit tests and get coverage

go test github.com/sberserker/dcagdax github.com/sberserker/dcagdax/exchanges  -coverprofile coverage.out
go tool cover -html=coverage.out -o coverage.html