_Please не проголосовать за ответы, которые не отвечают на этот вопрос!_ **Я downvoting ваш вопрос, потому что, как глупый вашим критериям**. Мастеркард не "включить новые бизнес-модели"; он просто сбил затрат для бизнес-моделей, которые уже существовали, во многих случаях приводя их вниз достаточно, что он прошел путь от домашнего производства до серьезного бизнеса. Глупо ждать каких-либо платежных технологий сделать возможным то, что ранее было на 100% невозможно (а не просто-еле-выгодно). Кроме того, ваш заголовок не соответствует вашему вопросу ("включено" != "уникальная-на-биткойн").

У меня есть калькулятор для расчета торгового платы за биткойн на биржах (http://tradeli.st)

Однако я вам задал много, чтобы добавить "короткое замыкание".

В принципе, для "длинной" позиции. Я делаю так:

КУПИТЬ 1 БТЦ @ 100 ДОЛЛАРОВ США
Продать .996 БТЦ @ $200 долларов США //купить сбор subtraced от суммы продажи 

Затем я беру еще один .6% от продажи, чтобы получить общие сборы (1.2%). Это все прекрасно работает и хорошо.

Но для короткого замыкания, (я не знаком с расчетом на короткие). Порядок обратный:

Продаю 1 БТЦ @ $200 долларов США //это то, что пользователь будет вводить начать
Купить ? БТЦ @ 100 ДОЛЛАРОВ США

Пользователь вводит "Продам 1 БТЦ @ 200$". Как я должен вычесть взносы на коротком?

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