The AE has been opened up again for experimental trading on heatwallet.com. Information from Slack: I now have 5 successful trades, it works fine as long as each order is less than 50% of current balance. I did the following HEAT purchases: 1) 989.9, HEAT, 2) 700 HEAT, 3) 300 HEAT, 4) 200 HEAT, 5) 100 HEAT. After each trade, I reduce my order, so that it is always below 50% of remaining BTC balance. I also wait for 2-3 confirmations on the blockchain before placing a new order. If there is a rollback, then I will have a problem, since all these orders will be lumped into the same block, and they will go to the unconfirmed list, since the total will be more than 50% of my BTC balance. Heatwallet is on version 0.9.21 - hopefully the 50% bug will be fixed in the upcoming 0.9.22. The clue is to avoid your Bid or Ask orders ending up in the unconfirmed list: https://heatwallet.com:7734/api/v1/blockchain/unconfirmed/0/0