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7 min readOptionals are a powerful feature in Swift that allow you to handle situations where a value may be missing. They are a way to represent the possibility of a value not existing, similar to nullable types in other programming languages.To use optionals in Swift, you need to declare a type as optional by appending a question mark (?) after the type name.
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8 min readMoving Average Convergence Divergence (MACD) is a popular technical indicator used in day trading. It is used to identify potential trend reversals, generate trade signals, and determine the overall market momentum.MACD consists of two lines, the MACD line (also known as the fast line) and the signal line (or the slow line). The MACD line is calculated by subtracting a longer-term exponential moving average (EMA) from a shorter-term EMA.
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7 min readIn Swift, loops are used to repeatedly execute a block of code until a specific condition is met. There are three types of loops available: for-in loops, while loops, and repeat-while loops.For-in Loops: For-in loops are used when you want to iterate over a sequence of elements. The loop declaration consists of the keyword 'for', followed by a constant or variable to represent each item in the sequence, the keyword 'in', and the sequence of items to be iterated.
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8 min readStochastic Oscillator is a technical analysis tool used in stock and forex trading to measure the momentum of price movements. It was developed by George Lane in the 1950s. The oscillator is based on the principle that as a market uptrend continues, closing prices tend to accumulate near the high end of the range, and conversely, during a downtrend, prices tend to close near the lower end of the range.The Stochastic Oscillator consists of two lines: %K and %D.
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5 min readIn Swift, the if-else statement is used to control the flow of program execution based on specific conditions. It allows you to execute code blocks selectively, depending on whether a certain condition is true or false.The basic syntax of an if-else statement in Swift is as follows: if condition { // code to be executed if condition is true } else { // code to be executed if condition is false } Here, the condition can be any expression that evaluates to a Boolean value (true or false).
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7 min readIn Swift, a function is a self-contained block of code that performs a specific task. To define a function, you need to follow a specific syntax. Here's the general structure: func functionName(parameters) -> ReturnType { // Code to be executed return returnValue } Let's break it down:func keyword: This is used to indicate the start of a function definition.functionName: This is the name you give to your function. Choose a descriptive and meaningful name.
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12 min readThe Force Index (FI) is a technical indicator used in day trading to measure the strength of forces driving price movements in a particular direction. It was developed by Alexander Elder, a well-known trader and author.Interpreting the Force Index involves analyzing both its direction and magnitude. The indicator combines price change, volume, and the concept of positive and negative forces in the market.
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6 min readTo create an array in Swift, you can use the following steps:Start by specifying the type of elements you want your array to hold. For example, if you want an array of integers, you would use the syntax var myArray: [Int] = []. Initialize an empty array by assigning an empty set of square brackets to the variable. This will create an empty array of the specified type. For example, var myArray: [Int] = [].
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9 min readChandelier Exit is a technical indicator commonly used in day trading. It was created by Charles LeBeau to help traders identify potential stop-loss levels in a volatile market. The indicator consists of a trailing stop that adjusts based on the volatility of the asset being traded.The Chandelier Exit indicator takes into account the highest high reached since the trade was initiated and calculates the trailing stop level based on a multiple of the Average True Range (ATR).
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4 min readIn Swift, variables and constants are declared using the var and let keywords respectively.To declare a variable, you use the var keyword followed by the name of the variable, a colon, and the type of the variable. For example: var age: Int In the above example, a variable named age of type Int (integer) is declared. It can be assigned any integer value.To declare a constant, you use the let keyword followed by the name of the constant, a colon, and the type of the constant.
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6 min readIn Swift, dictionaries are collections that store key-value pairs. By default, dictionary keys are case-sensitive when comparing values. However, if you want to initialize a case-insensitive dictionary, you can do so by utilizing the String type's case-insensitive comparison methods.