To start add you bittrex api key and secret to the configuration file /etc/app.configuration.php.dist and remove the .dist extension from the file. After that you can use the cli tool as shown below.
php ./app/cli.php <command>
Available commands:
php ./app/cli.php currencies: Get all supported currencies at Bittrex along with other meta data.
php ./app/cli.php markets: Get the open and available trading markets at Bittrex along with other meta data.
php ./app/cli.php market-history -m BTC-NLG: Retrieve the latest trades that have occurred for a specific market.
php ./app/cli.php market-summaries: Get the last 24 hour summary of all active exchanges.
php ./app/cli.php market-summaries -m BTC-NLG: Get the last 24 hour summary for the BTC-NLG exchange.
php ./app/cli.php order-book -m BTC-NLG: Get the current tick values for a market, e.g. BTC-NLG market.
php ./app/cli.php ticker -m BTC-NLG: Get the current tick values for a market, e.g. BTC-NLG market.