According to first aspect, a flow control valve comprises outer hollow cylinder and an indexing member. The hollow cylinder comprises a pressure port, a tank port, a first port and a second port on the curved surface. The indexing member comprises an inner cylinder, and is fit to the hollow part of the outer cylinder. When the inner cylinder is at a first relative position with the outer cylinder, the pressure port is connected to the first port and tank outlet is connected to the second port. When the inner cylinder is at a second relative position with the outer cylinder, the pressure port is connected to the second port and tank outlet is connected to first port. According to another aspect, a system for controlling a movement of a piston in an actuator may comprise an indexing valve, an actuator and a pump. The actuator comprises piston and piston rod. The indexing valve comprises outer cylinder and indexed inner cylinder. The pump is used to inject pressurized fluid. In one embodiment, piston is moved in one direction by the pressurized fluid when the indexed inner cylinder is at first index. In another embodiment, the piston is moved in other direction by the pressurized fluid when the indexed inner cylinder is at second index position.