Try MarketChameleon.com it is a free source Options and Equity data along with Volumes. Screens Large option Trades...
marketchameleon.com has a good earnings summary. Historical earnings price moves vs implied moves and forward implied moves here is a link to FB...
[ATTACH] Here is a payout diagram for short straddle for Nov 11 Expiration before Earnings
Option markets are pricing in a +/- 5.4% move for FB and +/- 5.6% move for BABA
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