Step 1: Click on the call option and then tap the chart icon.

Step 2: You can view both charts side by side.

Step 3: Click "Expand" to enter full-screen mode.

Step 4: Tap on the trade button.

Step 5: Swipe up to buy.

Step 6: Select the lot size and tap the tick mark.

Step 7: Change from market to limit order if needed.

Step 8: Drag the stop-loss/target lines to set your prices.

Step 9: Select "Intraday" or "Delivery" for the product type.

Step 10: Swipe to buy.