Currency Strength Board is a plugin that displays a bar chart representing the strength of various currencies. It identifies the best currency pairs to long or short based on their relative strength. Users can adjust the time frame and the number of previous bars (periods) used to calculate each currency's strength. Upon initial loading, the plugin processes data from multiple symbols according to the selected time frame, which may take some time. The plugin also saves the chosen time frame and periods in local storage, allowing these settings to persist across sessions in the cTrader platform.