Artharjan Profit and Loss Calculator allows users to calculate Profit and Loss of their trades and see it on the chart itself
Users are supposed to select either Long or Short, Enter quantity and enter traded price. The live P&L will be plotted on the chart.
Happy trading :-)
In true TradingView spirit, the author of this script has published it open-source, so traders can understand and verify it. Cheers to the author! You may use it for free, but reuse of this code in a publication is governed by House Rules. You can favorite it to use it on a chart.