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greenback 发表于 2011-7-14 19:16 Also, what is the basis for 300 shares instead of 200 shares in today's SDS trade?
Cobra 发表于 2011-7-14 20:16 去加国股市看07/11的trading signals,里面有解释怎么计算的。这是非常基本的概念,很惊讶,你在这里问, ...
greenback 发表于 2011-7-14 21:33 he he ... got it ...
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