limit order kia hota hay ?

Is mein mojood rate say neechay buy kia jata hay ya mojoda rate say onper sell kia jata hay misal k tor pr eur/usd ki mojooda qeemat 1.3070 hay ap chahty hain k isko qeemat jub 1.3020 pay ponchay to buy kr lain is liay ap limit order laga dain gay jub qeemat 1.3020 par ponchy gi to ap ki trade khud ba khud open ho jay gi.