Main trend lines: EMA (EMA (c, 10), 10), colored, with line thickness of 3;

B:= main trend line > REF (main trend line,1);

IF(B- 1, main trend line, DRAWNULL)COLORBLUE, LINETHICK3.

AA:=EMA(C，5)>EMA(C，20)；

BB:=EMA(C，5) CC:= EMA(C，5)>EMA(C， 10)；

CC 1:=EMA(C，5) DD:=CLOSESTICKLINE(AA，H，L，0，0)，COLORRED

Sticky line (AA, O, C, 3, 1) with red color;

Adhesive tape (AA and DD, O, C, 3, 0), red;

Bar lines (BB, h, l, 0, 0) are green in color;

STICKLINE(BB，O，C，3， 1)，COLORGREEN

Adhesive thread (BB and DD, O, C, 3, 0), green in color;

STICKLINE(BB and CC, h, l, 0, 1), COLORWHITE

STICKLINE(BB and CC, o, c, 3, 1), COLORWHITE

Sticky lines (BB and CC and DD, O, C, 3, 0) are white in color;

Adhesive tape (AA and CC 1, H, L, 0, 0), white in color;

The adhesive tape (AA and CC 1, O, C, 3, 1) is white;

Velcro tapes (AA and CC 1 and DD, O, C, 3, 0) are white in color;

AAA:=CONST(HHV(C，90))；

Drawtext (c and currbarscout = 80, AAA,' red K-line bulls, green K-line bears, white K-line wait and see.' )，COLORYELLOW

Generally speaking, the security of communication network should include five aspects: reliability, availability, confidentiality, integrity and non-repudiation.

1) reliability. Reliability refers to the ability of communication network to complete the specified functions under the specified conditions and within the specified time under the action of man-made or natural damage, or the ability of network to work normally within the quality allowable range. Reliability is the safety performance of network and equipment. The communication network is required to operate normally without interruption in all aspects such as planning and design, construction and installation, operation and maintenance, and dispatching management.

2) usability. Availability refers to the ability that information and communication services are allowed to be used by authorized individuals or entities when needed, or that network resources can be used when needed. Usability is user-oriented security performance, which means that when the network is partially damaged or needs to be degraded, the network should ensure minimum security and provide effective information and communication services for authorized users. Especially in important occasions, the availability of special users is particularly important (such as commander's communication in an emergency). Therefore, the communication network needs to adopt scientific and reasonable network topology, necessary redundancy, fault tolerance and backup measures, network self-healing technology, decentralized configuration and load sharing, and various perfect physical safety and emergency measures to ensure the safety of the communication network from the perspective of users.

3) confidentiality. Confidentiality refers to the characteristics of preventing information from being leaked or provided to unauthorized individuals or entities, or information from being used only by authorized users. Confidentiality is an information-oriented security feature. It is an important means to ensure the information security of communication network on the basis of reliability and availability. In modern communication networks, information can be roughly divided into two categories: user information and network management information. In the digital battlefield, the importance of user information confidentiality has been recognized. Since the Gulf War, people have paid more and more attention to the confidentiality and integrity of network management information.