***Max qty to buy (cash) does not show the amount of funds you have but the max number of shares that can be purchased with your cash at the price input in the order form.
For example, if you have $2000 cash and the stock price is $2, you can only buy slightly fewer than 1000 shares after factoring in  commission/platform/GST/regulatory fees and the fact that the lot size is in multiple of 100 for SGX-listed stocks.
Method 1:
Go to Watchlist and click on ...