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In possibility technique principle, we’ve a complete bunch of humorous expressions.

That’s the reason newcomers typically say it’s like studying a brand new language, together with the Greeks.

What does “worth sitting on prime of the ball” imply?

It refers back to the curvature of the T+0 curve within the payoff diagram and the place the worth is in relation to that curve.

Let’s break that assertion down and clarify the payoff diagram and T+0 line first.

Here’s a payoff diagram of an iron condor the place the expiration graph is proven in blue.

This payoff diagram, often known as the danger graph, is generated by ThinkOrSwim within the evaluation tab.

The T+0 line is the curved purple line.

The quantity on the backside horizontal axis of the graph is the worth of the underlying, which on this case is Tesla. It’s presently buying and selling at $257.

The quantity on the vertical axis on the left reveals the P&L (revenue and loss) at expiration for a given worth of TSLA.

So, for instance, if TSLA is at $230 at expiration, then the P&L of the iron condor can be $460.

If TSLA is at $310 at expiration, then the P&L of the commerce can be at a lack of -$500.

That is simply from studying the blue-colored graph.

Now that what the blue line tells us. Let’s clarify what the purple line tells us.

That is the T+0 line. It means present time plus zero days.

Effectively, the present time plus zero days is true now. Some folks will simply say right now.

That’s why it’s typically often known as the “right now line.”

It tells you what the P&L can be right now (versus at expiration).

For instance, if TSLA strikes to $280 right now, you’d be down roughly $50 from studying the purple line like this:

However do you see that the T+0 line is formed like a ball?

How about now? I’ve drawn a white squashed ball beneath the T+0 line.

Completely different software program might show the payoff diagram in another way. Right here is the payoff graph as displayed by OptionNet Explorer for a double calendar choices technique:

The underlying worth (on this case, SPX) is all the time proven as the underside horizontal axis numbers.

Nonetheless, this time the P&L is proven on the right-hand vertical axis.

You learn the graph the identical means.

The blue line is the expiration graph – though it’s curvy, in contrast to the straight strains of the iron condor.

The T+0 line is the crimson curved line on which the dot sits.

Do you see the ball?

Most income-style choices methods have this specific curvature of the T+0 line.

These methods are ones the place you don’t want to cost to maneuver too far to the left or too far to the appropriate. You simply need the worth to sit down there.

Specifically, you want for the worth to sit down proper on prime of the ball.

Right here is an instance of a butterfly technique on SPX.

The P&L is displaying a constructive $515 for this commerce.

Bear in mind, it’s attainable (though not notably probably) for SPX to maneuver 100 factors in a single day.

What if tomorrow, the worth moved from the present worth of 4140 to 4040?

You’ll be able to see from the T+0 line (beneath) that you’d lose your entire $500 revenue.

If it moved up 100 factors from 4140 to 4240, you additionally would lose $500 value of revenue.

As a result of the worth dot is above the ball, the T+0 slants downward on both aspect.

That implies that if the worth strikes up or down tomorrow by a major quantity, it’s probably that P&L will drop.

But when the worth strikes just a bit and that further day of theta revenue is bigger than the quantity misplaced by the worth motion, we will have a P&L improve tomorrow.

Subsequent, we see TSLA with the worth dot sitting on prime of the ball for a double calendar commerce:

I’ve turned on the delta histogram show on the backside of the graph.

You see that on the left aspect of the ball, the delta is constructive (as a result of the histogram is blue).

The histogram is crimson on the appropriate aspect of the ball, which means that the delta is damaging there.

The choice Greek delta tells you the slope of the T+0 curve.

Whether it is sloping up, as within the case on the left aspect of the ball, then delta is constructive.

If the curve is sloping down on the left aspect of the ball, then delta is damaging.

When delta is constructive, the commerce advantages if the underlying worth will increase.

When delta is damaging, the commerce advantages if the worth goes down.

You don’t need the worth to go up or down in a non-directional technique such because the double calendar or the iron condor.

You need delta to be flat (or as near zero as attainable).

You desire a flat delta with the worth sitting on prime of the ball.

So now what is supposed when folks say, “Value is sitting on prime of the ball.”

It applies to income-style trades the place the curved T+0 line kinds the highest of a ball.

Due to this fact, we don’t need the worth to maneuver too far to the left or to the appropriate.

In any other case, it could slide off the ball and lose our earnings.

On this introductory article, I wasn’t going to get into the superior Greeks, equivalent to gamma.

However right here is one thing for many who have heard of gamma.

The dome form of the T+0 line is attribute of trades with damaging gamma, which most revenue trades have.

The iron condor, the double calendar, and the broken-wing butterfly all have damaging gamma.

Damaging gamma implies that the commerce desires the worth to not transfer an excessive amount of.

In distinction, constructive gamma implies that the commerce will profit from an enormous worth transfer.

We hope you loved this text.

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*Disclaimer: The data above is for academic functions solely and shouldn’t be handled as funding recommendation. The technique introduced wouldn’t be appropriate for buyers who aren’t aware of alternate traded choices. Any readers on this technique ought to do their very own analysis and search recommendation from a licensed monetary adviser.*