Add more helpful calculations to preview output

This adds another preview output: dividing the commission by total
contract multiplier to get a basic "price the contract must change to
cover the commission" (and also provide (* 2) to cover open+closing
commission)

icli/cli.py

@@ -915,6 +915,21 @@ async def placeOrderForContract(
                     (trade.minCommission) / order.totalQuantity,
                     (trade.maxCommission) / order.totalQuantity,
                 )
+
+                if multiplier > 1:
+                    # (Basically: how much must the underlying change in price for you to pay off
+                    #             the commission for this order (note: probably 2x this to cover
+                    #             both sides of the commission to exit.)
+                    tcmin = trade.minCommission / order.totalQuantity / multiplier
+                    tcmax = trade.maxCommission / order.totalQuantity / multiplier
+                    logger.info(
+                        "[{}] PREVIEW COMMISSION PER UNDERLYING: ${:.4f} to ${:.4f} (2x: ${:.4f} to ${:.4f})",
+                        desc,
+                        tcmin,
+                        tcmax,
+                        2 * tcmin,
+                        2 * tcmax,
+                    )
             elif isset(trade.commission):
                 # futures contracts and index options contracts have fixed priced commissions so
                 # they don't provide a min/max range, it's just one guaranteed value.
@@ -924,6 +939,15 @@ async def placeOrderForContract(
                     (trade.commission) / order.totalQuantity,
                 )
 
+                tc = trade.commission / order.totalQuantity / multiplier
+                if multiplier > 1:
+                    logger.info(
+                        "[{}] PREVIEW COMMISSION PER UNDERLYING: ${:.4f} (2x: ${:.4f})",
+                        desc,
+                        tc,
+                        2 * tc,
+                    )
+
             # (if trade isn't valid, trade is an empty list, so only print valid objects...)
             if trade:
                 # sigh, these are strings of course.