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Quick hack to auto trade crypto currency on gdax platform.

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gdax-trading-cli

Monitors a single crypto currency trading stream on the GDAX and initiates buy / sell orders when trading price hits thresholds above and below a base price.

NOTE

This was created for fun and the algorithm is not super fancy.

It makes no real money but is fun to watch.

It is also fun to walk away from the computer and know your crypto is being bought / sold by the computer.

how is works in a nutshell

  • A basePrice and percentageSwing is initially set when the script is first started by querying last match price on gdax (basePrice can be passed into the script if a different starting price is desired)

  • A ante (amount of coins you are playing with) is also initiated when started

  • The script then monitors the gdax websocket feed (https://docs.gdax.com/#websocket-feed) looking for match trades to track current price and takes actions based upon current transactionMode and the trading percentage price difference from basePrice.

    Transaction Mode Description
    buy If last trading price less than percentageSwing from current basePrice, a market buy transaction is initiated using the Order API with a size of ante

    The transactionMode is then set to pending-buy
    sell If last trading price greater than percentageSwing from current basePrice, a market buy transaction is initiated using the Orders API resource with a size of ante

    The transactionMode is then set to pending-sell
    pending-buy While in this mode, once each transaction is received from the gdax websocket feed, it checks to see if the order has been filled using the Fills API resource

    Once the buy order has been filled the transactionMode is changed to sell and the basePrice is set to the current price
    pending-sell While in this mode, once each transaction is received from the gdax websocket feed, it checks to see if the order has been filled using the Fills API resource

    Once the sell order has been filled the transactionMode is changed to buy and the basePrice is set to the current price

    The script also tracks the slope of the each trade to determine if the price is going up / down (based upon last trade). In addition to the price delta it will also ensure the slope has at least shifted in prevent a sell / buy if the market is still moving. This is way too sensitive in reality b/c it is only looking back one price point.

how to install / run

  • Clone repo

  • npm install the packages

  • Update config.json with your gdax api credentials

  • Run the script

     $ node gdax_auto_trade.js [transactionMode] [productId] [percentageSwing] [ante] [basePrice]
    
     [config] = config filename
     [transactionMode] = what mode to start script in [buy,sell,pending-buy,pending-sell]
     [productId] = gdax product id [ETH-USD, BTC-USD, etc]
     [percentageSwing] = % range from base price that triggers buy / sell action
     [ante] = how many coins will be bought / sold when a buy / sell action is triggered
     [basePrice] (optional) = starting base price when script is run (typically read from gdax upon startup of script)
    
    

just want to monitor the gdax feed?

	$ node gdax_stream.js [productId] [transactionType]
	[productId] = gdax product id [ETH-USD, BTC-USD, etc]
	[transactionType] = transaction to track (`match` will provide output of current price)

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Quick hack to auto trade crypto currency on gdax platform.

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