You can short on Kraken. Fair warning: Kraken is absolutely not suitable for time sensitive trading. Their back end cannot handle low volume days, let alone hig

You can short on Kraken. Fair warning: Kraken is absolutely not suitable for time sensitive trading. Their back end cannot handle low volume days, let alone high volume days. You can expect to enter the same order 5-10 times before it goes through without unspecified failures, and this is challenging because it may not accurately report whether an order succeeded at the API level, or was actually filled. But if your strategy can tolerate some uncertainly in when you'll be able to make an order, I guess it's ok.