Strategy Builder
Comprehensive Strategy Development Tool
Overview
Strategy Builder (SB) is a widget which simplifies the creation of strategies including positions which can be a mixture of cash, Options, and underlying asset. Individual positions can be added in the widget to develop and analyze various strategies.
While advanced methods like using Black-Scholes widget together with Position and Strategy widgets exist in OSS, the SB offers a simpler, more user-friendly alternative. It consolidates multiple features into one place, allowing for efficient strategy management. Once the strategy is built, it can be easily exported to other widgets, such as Graph, for detailed analysis and visualization.
Accessing the Widget
The widget can be found in the menu under Options.
Adding Positions and Their Parameters
As many individual positions cab be added to the Strategy Builder (SB) by clicking on the plus (+) symbol below the last row (see the figure).
Subsequently, the parameters of each position should be entered either manually or through the input interface (inlet). The parameter fields are listed below:
Type
Underlying Price
Expiry
Strike
Option Price and (Implied) Volatility
Side
Size
Entry Price
Type
In this field the following alternatives can be chosen:
Call
Put
Underlying
Cash
For Call and Put all parameter fields need to be filled.
Note that Option Price represents the current price of the contract which, based on the entry or input, can be the mark price, best ask, or best bid price of the market, while the Entry Price represents the average buy or sell price of the contract traded by the user.
The field Underlying (Type = Underlying) allows users to represent their positions in spot or futures markets. For example, if you hold 100 shares with an average purchase price of $20 in your portfolio, you can represent them as an Underlying position with Side = Long, Size = 100, and Entry Price = 20. This way you can see the effect of this position in your overall portfolio output as well.
In certain cases, it is possible to add so-called perpetual futures positions to the overall strategy by using Type = Underlying. For example, if there is a short position on a stock with a size of 10 contracts and a leverage of 3 at an average selling price of USD 25, this position can be represented in the strategy as follows: Type = Underlying, Side = Short, Size = 30, Entry Price = 25.
Depending on how many shares correspond to a futures contract and your leverage, you should adjust the Size parameter accordingly. To check it, you can simply connect the outlet of the position individually to the inlet of a graph and monitor how the position's value changes for a one-unit change in the underlying asset.
Alternatively, you can connect the outlet of the position to a data selector widget and check the delta value. This value should correspond to the total leverage of your futures position.
Cash positions allow you to incorporate positive and negative cash offsets into your strategies. An example of such a use case is the cash-secured put strategy. You can simulate the risk profile of your strategy based on the combination of cash and put positions and examine it in more detail (see figure).
Underlying Price
When trading Options on the spot market, the underlying value of your options refers to the current spot price of the underlying asset. This price remains constant across different option expiries. However, there are situations where the underlying price for certain options may vary.
One example is Options that are based on futures contracts. Since futures contracts have different prices depending on their expiration dates, the underlying prices of options based on them also vary. Another example is trading the same options derived from the same underlying asset but on different spot markets, where slight price differences may exist.
In such cases, it is crucial to consider different underlying prices for each option to ensure accurate calculation of other parameters.
In case there are different underlying prices for different positions in SB, the outcome will be shown separately in the Graph widget connected to the SB. Dashed lines mark the different underlying prices.
Expiry
If the data of the position gets imported via the inlet, this field will automatically be filled according its source, otherwise you should set the Option's expiration date manually by clicking on the calendar symbol 
or by clicking on the date or time and adjusting it using arrow keys of your keyboard.
Strike
The strike price of an Option (also known as the exercise price) is the predetermined price at which the Option buyer can buy or sell the underlying asset (such as stocks, commodities, or currencies) when exercising the Option. If the data is imported to the position via its inlet, the field will automatically be filled; otherwise, it must be filled manually.
Option Price and (Implied) Volatility
If Option Price is specified as the input parameter for the position, the volatility is automatically calculated using this price and other input parameters. This volatility, calculated by the Black-Scholes model, is called "implied volatility" (IV). On the other hand, if volatility is specified as the input parameter, it is no longer implied volatility but rather volatility estimated or calculated independently. In this case, the option price is calculated using the Black-Scholes model and the specified volatility as the input parameter.
It's important to understand the interdependency between the two fields, Option Price and (Implied) Volatility. The Black-Scholes model used for Option simulations in this widget accepts either the Option price or volatility as an input parameter and calculates the other parameter as an output value, depending on the chosen input parameter. This means that you can enter only one of these two parameters in the input field at a time, and the other value will be automatically calculated.
It's worth reminding that the parameters Expiry, Strike, Option Price, and (Implied) Volatility must be filled only when the type is selected as Call or Put, for other cases, namely Underlying and Cash these parameters will be deactivated.
Side
The direction or type of position, Long or Short, can be selected in this field. Long is the buy position, and Short is the sell positon.
Size
The Size parameter refers to the number of Options or Futures contracts, or the volume of the underlying asset traded. By default, this parameter is set at 1, so it must be modified manually based on the user's position size.
Entry Price
The Entry Price is the average unit price at which the trade is executed. This entry, basically, should be entered by the user. This price can differ from the current price, i.e., the Option Price when the Type is set to Call or Put, or the Underlying Price when the type is set to Underlying. In other words, the difference between the Entry Price and the current price determines the current unrealized profit or loss of the position.
Feeding the SB
Each position in the Strategy Builder has an receiving socket (Inlet) which is an input interface through which the position's parameters can be fed from outside, i.e., through the outlet of another appropriate widgets (e.g., Option widget or Position widget). The automatically filled parameters of the linked positions remain unchanged and can only be manually changed once the link is unplugged.
The following widgets can be connected to Strategy Builder via its inlet:
Importing Data from Option Chain
It is possible to import the data of a certain Option contract right from the market via Option Chain widget.
This will automatically populate the Option's parameters into the corresponding fields in the position row. This offers the advantage of continuously updating real-time data, such as the Option price.
Black-Scholes and Position Widgets
After creating an Option position using the combination of Black-Scholes and Position widgets, you can link the output of the Position widget to a position row in the SB to automatically transfer all the parameters of your position to the SB. One significant advantage of this method is that if the Black-Scholes or Position Widget themselves are fed with dynamic values from external sources, these parameters are dynamically transferred to the position rows of the SB.
Output Interfaces
SB Output
The top outlet interface of the SB widget is the strategy output interface. Through this interface, all selected (i.e. those whose selection box in the left is checked) data from the combined individual positions are transmitted as a coherent strategy to other suitable widgets such as Graph and Data Selector.
Individual Position Output
For each individual position in the SB, an outlet is available, allowing the respective data to be linked out to other suitable widgets.
Deleting or Deactivating Positions
By deleting a position row in the Strategy Builder, that position is removed from the overall strategy, and all related data is deleted. An alternative way to temporarily disable an individual position is to deactivate it by unchecking the corresponding box to the left of the position row.
It's important to note that deactivating a position only affects the output of the overall strategy. yet, the position's data remains available at its own outlet and can still be linked with other widgets.
Scenario Analysis
In the upper part of the widget, various mini-tools for shaping and analyzing scenarios for your strategy can be found.
Underlying Price
To correctly calculate all strategy parameters, a uniform underlying asset price is required for all positions. It's important to note that changes in the underlying asset price can have different effects on the results of calculations, depending on whether Option Price or Volatility was set as input parameters for all positions.
For example, if you want to examine the impact of changes in the Underlying Price on the Option prices in the positions, you should have Option Price as the output and Volatility as the (constant) input. This takes changes in the underlying asset price into account while considering volatility as constant, and the Option price is calculated based on these parameters.
Conversely, by setting Option Price as the (constant) input, you can examine the effects of changes in the Underlying Price on the Implied Volatility.
Analyzing Volatility Changes
The impact of changes in volatility on the strategy can be easily and quickly examined using the Volatility (% change) slider.
The Strategy Builder widget includes a Volatility Adjustment feature that allows users to see how changes in implied volatility affect their overall strategy. By using the volatility slider, located in the upper part of the widget, users can adjust the implied volatility percentage. Moving the Volatility Slider makes the IV of all Option positions in the widget change between -99% (near-zero volatility) and 100% (twice the current value). Simultaneously, the Option prices for each position are calculated based on the new input parameters and displayed as output. This effect is best visualized using the Graph Widget.
It's important to note that even if the parameters of a position are supplied from external widget(s), changing implied volatility by the slider makes recalculation in the option price.
The refresh button in the Volatility slider resets the implied volatility changes back to zero, restoring all values to their original state.
Changing Days Till Expiry
By the Days till expiry slider, the number of days remaining until the Option's expiry date can be manually changed. This way, the changes in other parameters can be examined as the number of days till expiry changes.
The current date of the slider, known as the Valuation Date, is the date and time at which the current Option prices and the current unrealized profit or loss of the positions in a strategy are determined. The default value for the Valuation Date is the current date and time.
The farthest date on the slider is automatically set and cannot be adjusted manually. This date is determined by the earliest expiration date among the selected options in the positions within the strategy.
The earliest date on the slider can be manually set using the calendar symbol
.
Valuation Date can also be manually changed by clicking on the calendar symbol 
below the slider. This will open a calendar that allows you to set the date and time.
Using the Reset symbol 
the changes can simply be undone.
Some Errors in SB
Input Fields
As with all other widgets, red-framed fields indicate that they need to be filled in for the widget to calculate its outputs correctly.
Error Message in Minimized State
If you notice an error message on the minimized widget, it means that an error or warning message has occurred in the widget. To identify and resolve the widget needs to be opened.
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