强制平仓只发生在做空的情况下，这时保证金就是BTS啊，如果你的BTS不够，也就是说保证金不够，那么你就不能做空大单子。这其实就是为什么BTS价格会涨的原因，因为你想做空多大的单子，就得准备两倍价值的BTS来抵押。
你假设的极端情况其实不存在，既然价格那么高，那总会有人忍不住来卖掉的

是卖空单已经成交之后，倘若交易引擎在撮合普通的买卖单之后，BTA价格已经远远高于平仓价格，会可能出现抵押的BTS用完都无法平仓的情况。

According to the exiting margin call algorithm,if the bid price is much lower than the highest call price after matching the normal market order,is it possible that even the collateral BTS has been used up, but still can not cover the short position?

                       {
                           // consume the full call, leave change in the bid
                            auto cover_amount = payoff * call_price;
                            working_call.amount -= cover_amount; // is it possible the working_call.amount<=0
                            loan_amount         += payoff;
                            collateral_amount   += cover_amount + cover_amount;
                            working_bid.amount  -= cover_amount;

                            market_trx.inputs.push_back( call_itr->location );
                            if( working_call.amount.get_rounded_amount() > 0 )
                            {
                               // TODO.. charge a 5% fee
                               market_trx.outputs.push_back(
                                                   trx_output( claim_by_signature_output( cover_claim.owner ), working_call.amount ) );
                            }
                            ++call_itr;
                            if( call_itr != margin_positions.end() )
                            {
                               working_call = get_output( call_itr->location );
                               cover_claim  = working_call.as<claim_by_cover_output>();
                            }
                         }

Today I made more progress on the block generation and validation algorithm.   The wallet has successfully mined a few blocks and the difficulty goes up when there is not enough Proof of Stake. 

Tomorrow I will do the following:
1) Select inputs from your wallet oldest-first so that your transactions can be validated as quickly as possible and contribute the most to securing the chain.
2) Automatically generate transactions to yourself if it will generate enough CDD to reduce the difficulty to the minimum amount.

In response to the question about eliminating mining, I have concluded that ripple-style consensus would have more downsides than straight up POS mining.  Namely, even with 100 nodes people would call it centralized.   I will probably work on a consensus based system in the future, but the POS mining is easier now.

Unlike NXT most of the transactions fees are paid as dividends and only a small portion paid to miners.   Also unlike NXT, everyone is contributing to the security of the network when they make a transaction.

the update bts wallet client unable to connect to bitshares network now, need any special setting?

28号测试链不可能成为正式链，对安全最核心的pos+consensus代码还没完成，现在只是单点生成block，这样的链条作为正式版是很危险的。

no, according to the existing market order matching algorithm, C will buy 1000 usd from B with price 1 usd/bts.

btw, why C place the order with the price 1 usd/bts if market has already offerred price 100 usd/bts

anyone can debug the workspace? i tried to debug on win platform, but failed.

这个例子里A以0.01bts的价格发行了usd,而b以0.1bts的价格买入，此时usd以0.1bts的价格成交，倘若此时b在以1bts的价格微量买入use会不会导致a瞬间暴仓呢？


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自己的问题刚刚想明白了，刚开始没有市场深度的时候这情况有可能发生的，市场深度跟量出来了就不太可能发生以上情况了。


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seems hackfisher has fix the issue,pull the update code and retry.


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