Posts (page 64)
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4 min readThe Rate of Change (ROC) is a commonly used technical indicator that measures the speed at which a variable - typically the price of a financial asset - is changing over a specified period of time. The ROC can provide valuable insights into the momentum or strength of a trend.To calculate the ROC, you need two key pieces of information: the current value of the variable and its value at a previous point in time. The calculation involves comparing the percentage change between the two values.
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6 min readGuard statements in Swift are control flow statements that are used to ensure certain conditions are met in order for the code to continue executing. They provide an early exit from a block of code if the specified condition evaluates to false or nil.The structure of a guard statement consists of the keyword "guard" followed by a condition that needs to be checked. If this condition evaluates to false or nil, the code block following the guard statement is exited immediately.
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12 min readThe Triangular Moving Average (TMA) is a popular technical analysis tool used by traders to smooth out price data and identify trends. It is similar to other moving averages, but it assigns more weightage to the recent prices, making it more responsive to price changes. TMA is particularly useful for traders looking for a smoother moving average that reduces noise and provides a clearer view of the direction of the market.
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7 min readTo unwrap optionals safely in Swift, you can follow these guidelines:Using if let: The if let statement allows you to unwrap an optional value safely within a conditional block. If the optional has a value, it gets assigned to a constant or variable, and you can use it within the block. If the optional is nil, the block is not executed.
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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] = [].