An ankle holster can be a very effective way to carry and conceal a handgun on your person. While there are several ways that an ankle holster can be placed, let's talk about drawing from the inside position of the support leg with your primary hand. So if you are right-handed the holster and weapon will be placed on the inside of the left leg.
When drawing from an ankle holster placed in the position noted above, your first movement will be to take a step forward with your left leg and place your right knee on the ground. Next you have to clear the pant leg that is covering the handgun. A common method used to clear the pant leg is to grab the lower part of the pant leg on either side with both hands and lift it. This will expose the weapon. Once you have exposed the handgun, you can establish a good firing grip with your primary hand, which allows for an effective draw. Because this method is so entirely different from drawing from a duty holster, it will require a lot of practice before you can become proficient.
Out of the Pocket
Pocket holsters have become extremely popular with civilians who have concealed carry licenses and want to carry subcompact pistols in a pants pocket. They are also popular with officers for backup, undercover, and off-duty carry.
Pocket holsters are deceptively simple, but they do have their issues. When drawing the handgun from the pocket, on occasion the holster will remain attached to the gun and will require the additional step of removing the holster from the gun once it has already been drawn.