Can I see the prices and volumes of the last trades in chart?

No. We only show the historical Best BID and Best ASK prices and their volumes.

Can I download the historical price feed?

Yes, you can download it in Historical Data Manager of JForex4. It is free.

Can I use the historical price feed of JForex in Metatrader?

Yes. You can download the data in .csv or .hst format and import in MT4 or MT5. Be carefull to use BID side data, as Metatrader is not showing ASK side data anywhere.

Why is the Stop order triggered at the price, which is not shown in the charts?

The order can be triggered ONLY if the price has reached that level. You must be looking at the wrong side. Remember to look at the BIDs chart if SELLING order and ASK if BUYING. Stop Loss closing the LONG position is a SELL order (check BIDs). Stop Loss closing a SHORT position is a BUY order (check ASKs).