diff --git a/package.json b/package.json
index 85c9afb2..0d4f6b56 100644
--- a/package.json
+++ b/package.json
@@ -10,6 +10,7 @@
   },
   "description": "TSLint rules for RxJS",
   "devDependencies": {
+    "@phenomnomnominal/tsquery": "^1.0.5",
     "@types/chai": "^4.0.0",
     "@types/decamelize": "^1.2.0",
     "@types/mocha": "^5.0.0",
diff --git a/source/rules/rxjsJustRule.ts b/source/rules/rxjsJustRule.ts
new file mode 100644
index 00000000..3d707ef0
--- /dev/null
+++ b/source/rules/rxjsJustRule.ts
@@ -0,0 +1,94 @@
+/**
+ * @license Use of this source code is governed by an MIT-style license that
+ * can be found in the LICENSE file at https://github.com/cartant/rxjs-tslint-rules
+ */
+/*tslint:disable:no-use-before-declare*/
+
+import * as Lint from "tslint";
+import * as ts from "typescript";
+import * as tsutils from "tsutils";
+
+import { tsquery } from "@phenomnomnominal/tsquery";
+import { couldBeType } from "../support/util";
+
+const defaultNamesRegExp = /^(canActivate|canActivateChild|canDeactivate|canLoad|intercept|resolve|validate)$/;
+const defaultTypesRegExp = /^EventEmitter$/;
+
+export class Rule extends Lint.Rules.TypedRule {
+
+    public static metadata: Lint.IRuleMetadata = {
+        description: "Enforces the use of a `just` alias for `of`.",
+        options: null,
+        optionsDescription: "Not configurable.",
+        requiresTypeInfo: true,
+        ruleName: "rxjs-just",
+        type: "style",
+        typescriptOnly: true
+    };
+
+    public static FAILURE_STRING = "Use just alias";
+
+    public applyWithProgram(sourceFile: ts.SourceFile, program: ts.Program): Lint.RuleFailure[] {
+
+        return this.applyWithWalker(new Walker(sourceFile, this.getOptions(), program));
+    }
+}
+
+class Walker extends Lint.ProgramAwareRuleWalker {
+
+    walk(sourceFile: ts.SourceFile): void {
+
+        const typeChecker = this.getTypeChecker();
+        let importIdentifier: ts.Identifier | undefined = undefined;
+
+        const importDeclarations = tsquery(
+            sourceFile,
+            `ImportDeclaration:has(StringLiteral[value="rxjs"]),ImportDeclaration:has(StringLiteral[value="rxjs/observable/of"])`
+        );
+        importDeclarations.forEach(importDeclaration => {
+            let importSpecifiers = tsquery(
+                importDeclaration,
+                `ImportSpecifier:has(Identifier[escapedText="of"])`
+            );
+            importSpecifiers.forEach(importSpecifier => {
+                if (tsutils.isImportSpecifier(importSpecifier)) {
+                    if (!importSpecifier.propertyName && (importSpecifier.name.getText() === "of")) {
+                        importIdentifier = importSpecifier.name;
+                        const fix = Lint.Replacement.replaceFromTo(
+                            importIdentifier.getStart(),
+                            importIdentifier.getStart() + importIdentifier.getWidth(),
+                            "of as just"
+                        );
+                        this.addFailureAtNode(importIdentifier, Rule.FAILURE_STRING, fix);
+                    }
+                }
+            });
+        });
+
+        if (importIdentifier) {
+            const callExpressions = tsquery(
+                sourceFile,
+                `CallExpression:has(Identifier[escapedText="of"])`
+            );
+            callExpressions.forEach(callExpression => {
+                if (tsutils.isCallExpression(callExpression)) {
+                    const expression = callExpression.expression;
+                    if (tsutils.isIdentifier(expression)) {
+
+                        const symbol = typeChecker.getSymbolAtLocation(expression);
+                        const [declaration] = symbol.getDeclarations();
+
+                        if (declaration === importIdentifier.parent) {
+                            const fix = Lint.Replacement.replaceFromTo(
+                                expression.getStart(),
+                                expression.getStart() + expression.getWidth(),
+                                "just"
+                            );
+                            this.addFailureAtNode(expression, Rule.FAILURE_STRING, fix);
+                        }
+                    }
+                }
+            });
+        }
+    }
+}
diff --git a/test/v5/fixtures/just/default/fixture.ts.fix b/test/v5/fixtures/just/default/fixture.ts.fix
new file mode 100644
index 00000000..e9c626c1
--- /dev/null
+++ b/test/v5/fixtures/just/default/fixture.ts.fix
@@ -0,0 +1,4 @@
+import { of as just } from "rxjs/observable/of";
+
+const a = just("a");
+
diff --git a/test/v5/fixtures/just/default/fixture.ts.lint b/test/v5/fixtures/just/default/fixture.ts.lint
new file mode 100644
index 00000000..a8ffac1e
--- /dev/null
+++ b/test/v5/fixtures/just/default/fixture.ts.lint
@@ -0,0 +1,7 @@
+import { of } from "rxjs/observable/of";
+         ~~                                 [just]
+
+const a = of("a");
+          ~~                                [just]
+
+[just]: Use just alias
diff --git a/test/v5/fixtures/just/default/tsconfig.json b/test/v5/fixtures/just/default/tsconfig.json
new file mode 100644
index 00000000..690be78e
--- /dev/null
+++ b/test/v5/fixtures/just/default/tsconfig.json
@@ -0,0 +1,13 @@
+{
+  "compilerOptions": {
+    "baseUrl": ".",
+    "lib": ["es2015"],
+    "noEmit": true,
+    "paths": {
+      "rxjs": ["../../node_modules/rxjs"]
+    },
+    "skipLibCheck": true,
+    "target": "es5"
+  },
+  "include": ["fixture.ts"]
+}
diff --git a/test/v5/fixtures/just/default/tslint.json b/test/v5/fixtures/just/default/tslint.json
new file mode 100644
index 00000000..aca02862
--- /dev/null
+++ b/test/v5/fixtures/just/default/tslint.json
@@ -0,0 +1,8 @@
+{
+  "defaultSeverity": "error",
+  "jsRules": {},
+  "rules": {
+    "rxjs-just": { "severity": "error" }
+  },
+  "rulesDirectory": "../../../../../build/rules"
+}
diff --git a/test/v5/fixtures/just/user-land/fixture.ts.fix b/test/v5/fixtures/just/user-land/fixture.ts.fix
new file mode 100644
index 00000000..66a32ee2
--- /dev/null
+++ b/test/v5/fixtures/just/user-land/fixture.ts.fix
@@ -0,0 +1,16 @@
+import { of as just } from "rxjs/observable/of";
+
+function foo(): void {
+    function of(): void {}
+    of();
+}
+
+function bar(of: Function): void {
+    of();
+}
+
+function baz(): void {
+    const of = () => {};
+    of();
+}
+
diff --git a/test/v5/fixtures/just/user-land/fixture.ts.lint b/test/v5/fixtures/just/user-land/fixture.ts.lint
new file mode 100644
index 00000000..b0c4d072
--- /dev/null
+++ b/test/v5/fixtures/just/user-land/fixture.ts.lint
@@ -0,0 +1,18 @@
+import { of } from "rxjs/observable/of";
+         ~~                                 [just]
+
+function foo(): void {
+    function of(): void {}
+    of();
+}
+
+function bar(of: Function): void {
+    of();
+}
+
+function baz(): void {
+    const of = () => {};
+    of();
+}
+
+[just]: Use just alias
diff --git a/test/v5/fixtures/just/user-land/tsconfig.json b/test/v5/fixtures/just/user-land/tsconfig.json
new file mode 100644
index 00000000..690be78e
--- /dev/null
+++ b/test/v5/fixtures/just/user-land/tsconfig.json
@@ -0,0 +1,13 @@
+{
+  "compilerOptions": {
+    "baseUrl": ".",
+    "lib": ["es2015"],
+    "noEmit": true,
+    "paths": {
+      "rxjs": ["../../node_modules/rxjs"]
+    },
+    "skipLibCheck": true,
+    "target": "es5"
+  },
+  "include": ["fixture.ts"]
+}
diff --git a/test/v5/fixtures/just/user-land/tslint.json b/test/v5/fixtures/just/user-land/tslint.json
new file mode 100644
index 00000000..aca02862
--- /dev/null
+++ b/test/v5/fixtures/just/user-land/tslint.json
@@ -0,0 +1,8 @@
+{
+  "defaultSeverity": "error",
+  "jsRules": {},
+  "rules": {
+    "rxjs-just": { "severity": "error" }
+  },
+  "rulesDirectory": "../../../../../build/rules"
+}
diff --git a/test/v6-compat/fixtures/just/default/fixture.ts.fix b/test/v6-compat/fixtures/just/default/fixture.ts.fix
new file mode 100644
index 00000000..e9c626c1
--- /dev/null
+++ b/test/v6-compat/fixtures/just/default/fixture.ts.fix
@@ -0,0 +1,4 @@
+import { of as just } from "rxjs/observable/of";
+
+const a = just("a");
+
diff --git a/test/v6-compat/fixtures/just/default/fixture.ts.lint b/test/v6-compat/fixtures/just/default/fixture.ts.lint
new file mode 100644
index 00000000..a8ffac1e
--- /dev/null
+++ b/test/v6-compat/fixtures/just/default/fixture.ts.lint
@@ -0,0 +1,7 @@
+import { of } from "rxjs/observable/of";
+         ~~                                 [just]
+
+const a = of("a");
+          ~~                                [just]
+
+[just]: Use just alias
diff --git a/test/v6-compat/fixtures/just/default/tsconfig.json b/test/v6-compat/fixtures/just/default/tsconfig.json
new file mode 100644
index 00000000..690be78e
--- /dev/null
+++ b/test/v6-compat/fixtures/just/default/tsconfig.json
@@ -0,0 +1,13 @@
+{
+  "compilerOptions": {
+    "baseUrl": ".",
+    "lib": ["es2015"],
+    "noEmit": true,
+    "paths": {
+      "rxjs": ["../../node_modules/rxjs"]
+    },
+    "skipLibCheck": true,
+    "target": "es5"
+  },
+  "include": ["fixture.ts"]
+}
diff --git a/test/v6-compat/fixtures/just/default/tslint.json b/test/v6-compat/fixtures/just/default/tslint.json
new file mode 100644
index 00000000..aca02862
--- /dev/null
+++ b/test/v6-compat/fixtures/just/default/tslint.json
@@ -0,0 +1,8 @@
+{
+  "defaultSeverity": "error",
+  "jsRules": {},
+  "rules": {
+    "rxjs-just": { "severity": "error" }
+  },
+  "rulesDirectory": "../../../../../build/rules"
+}
diff --git a/test/v6-compat/fixtures/just/user-land/fixture.ts.fix b/test/v6-compat/fixtures/just/user-land/fixture.ts.fix
new file mode 100644
index 00000000..66a32ee2
--- /dev/null
+++ b/test/v6-compat/fixtures/just/user-land/fixture.ts.fix
@@ -0,0 +1,16 @@
+import { of as just } from "rxjs/observable/of";
+
+function foo(): void {
+    function of(): void {}
+    of();
+}
+
+function bar(of: Function): void {
+    of();
+}
+
+function baz(): void {
+    const of = () => {};
+    of();
+}
+
diff --git a/test/v6-compat/fixtures/just/user-land/fixture.ts.lint b/test/v6-compat/fixtures/just/user-land/fixture.ts.lint
new file mode 100644
index 00000000..b0c4d072
--- /dev/null
+++ b/test/v6-compat/fixtures/just/user-land/fixture.ts.lint
@@ -0,0 +1,18 @@
+import { of } from "rxjs/observable/of";
+         ~~                                 [just]
+
+function foo(): void {
+    function of(): void {}
+    of();
+}
+
+function bar(of: Function): void {
+    of();
+}
+
+function baz(): void {
+    const of = () => {};
+    of();
+}
+
+[just]: Use just alias
diff --git a/test/v6-compat/fixtures/just/user-land/tsconfig.json b/test/v6-compat/fixtures/just/user-land/tsconfig.json
new file mode 100644
index 00000000..690be78e
--- /dev/null
+++ b/test/v6-compat/fixtures/just/user-land/tsconfig.json
@@ -0,0 +1,13 @@
+{
+  "compilerOptions": {
+    "baseUrl": ".",
+    "lib": ["es2015"],
+    "noEmit": true,
+    "paths": {
+      "rxjs": ["../../node_modules/rxjs"]
+    },
+    "skipLibCheck": true,
+    "target": "es5"
+  },
+  "include": ["fixture.ts"]
+}
diff --git a/test/v6-compat/fixtures/just/user-land/tslint.json b/test/v6-compat/fixtures/just/user-land/tslint.json
new file mode 100644
index 00000000..aca02862
--- /dev/null
+++ b/test/v6-compat/fixtures/just/user-land/tslint.json
@@ -0,0 +1,8 @@
+{
+  "defaultSeverity": "error",
+  "jsRules": {},
+  "rules": {
+    "rxjs-just": { "severity": "error" }
+  },
+  "rulesDirectory": "../../../../../build/rules"
+}
diff --git a/test/v6/fixtures/just/default/fixture.ts.fix b/test/v6/fixtures/just/default/fixture.ts.fix
new file mode 100644
index 00000000..b140d7d7
--- /dev/null
+++ b/test/v6/fixtures/just/default/fixture.ts.fix
@@ -0,0 +1,4 @@
+import { of as just } from "rxjs";
+
+const a = just("a");
+
diff --git a/test/v6/fixtures/just/default/fixture.ts.lint b/test/v6/fixtures/just/default/fixture.ts.lint
new file mode 100644
index 00000000..66948595
--- /dev/null
+++ b/test/v6/fixtures/just/default/fixture.ts.lint
@@ -0,0 +1,7 @@
+import { of } from "rxjs";
+         ~~                 [just]
+
+const a = of("a");
+          ~~                [just]
+
+[just]: Use just alias
diff --git a/test/v6/fixtures/just/default/tsconfig.json b/test/v6/fixtures/just/default/tsconfig.json
new file mode 100644
index 00000000..690be78e
--- /dev/null
+++ b/test/v6/fixtures/just/default/tsconfig.json
@@ -0,0 +1,13 @@
+{
+  "compilerOptions": {
+    "baseUrl": ".",
+    "lib": ["es2015"],
+    "noEmit": true,
+    "paths": {
+      "rxjs": ["../../node_modules/rxjs"]
+    },
+    "skipLibCheck": true,
+    "target": "es5"
+  },
+  "include": ["fixture.ts"]
+}
diff --git a/test/v6/fixtures/just/default/tslint.json b/test/v6/fixtures/just/default/tslint.json
new file mode 100644
index 00000000..aca02862
--- /dev/null
+++ b/test/v6/fixtures/just/default/tslint.json
@@ -0,0 +1,8 @@
+{
+  "defaultSeverity": "error",
+  "jsRules": {},
+  "rules": {
+    "rxjs-just": { "severity": "error" }
+  },
+  "rulesDirectory": "../../../../../build/rules"
+}
diff --git a/test/v6/fixtures/just/user-land/fixture.ts.fix b/test/v6/fixtures/just/user-land/fixture.ts.fix
new file mode 100644
index 00000000..8378b89d
--- /dev/null
+++ b/test/v6/fixtures/just/user-land/fixture.ts.fix
@@ -0,0 +1,16 @@
+import { of as just } from "rxjs";
+
+function foo(): void {
+    function of(): void {}
+    of();
+}
+
+function bar(of: Function): void {
+    of();
+}
+
+function baz(): void {
+    const of = () => {};
+    of();
+}
+
diff --git a/test/v6/fixtures/just/user-land/fixture.ts.lint b/test/v6/fixtures/just/user-land/fixture.ts.lint
new file mode 100644
index 00000000..01e900c5
--- /dev/null
+++ b/test/v6/fixtures/just/user-land/fixture.ts.lint
@@ -0,0 +1,18 @@
+import { of } from "rxjs";
+         ~~                         [just]
+
+function foo(): void {
+    function of(): void {}
+    of();
+}
+
+function bar(of: Function): void {
+    of();
+}
+
+function baz(): void {
+    const of = () => {};
+    of();
+}
+
+[just]: Use just alias
diff --git a/test/v6/fixtures/just/user-land/tsconfig.json b/test/v6/fixtures/just/user-land/tsconfig.json
new file mode 100644
index 00000000..690be78e
--- /dev/null
+++ b/test/v6/fixtures/just/user-land/tsconfig.json
@@ -0,0 +1,13 @@
+{
+  "compilerOptions": {
+    "baseUrl": ".",
+    "lib": ["es2015"],
+    "noEmit": true,
+    "paths": {
+      "rxjs": ["../../node_modules/rxjs"]
+    },
+    "skipLibCheck": true,
+    "target": "es5"
+  },
+  "include": ["fixture.ts"]
+}
diff --git a/test/v6/fixtures/just/user-land/tslint.json b/test/v6/fixtures/just/user-land/tslint.json
new file mode 100644
index 00000000..aca02862
--- /dev/null
+++ b/test/v6/fixtures/just/user-land/tslint.json
@@ -0,0 +1,8 @@
+{
+  "defaultSeverity": "error",
+  "jsRules": {},
+  "rules": {
+    "rxjs-just": { "severity": "error" }
+  },
+  "rulesDirectory": "../../../../../build/rules"
+}
diff --git a/yarn.lock b/yarn.lock
index 4fa36d2c..4ac68173 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2,6 +2,12 @@
 # yarn lockfile v1
 
 
+"@phenomnomnominal/tsquery@^1.0.5":
+  version "1.0.5"
+  resolved "https://registry.yarnpkg.com/@phenomnomnominal/tsquery/-/tsquery-1.0.5.tgz#ba75d8e403f23a67b49d983b763918f6505441e4"
+  dependencies:
+    esquery "^1.0.1"
+
 "@types/chai@^4.0.0":
   version "4.1.3"
   resolved "https://registry.yarnpkg.com/@types/chai/-/chai-4.1.3.tgz#b8a74352977a23b604c01aa784f5b793443fb7dc"
@@ -11,8 +17,8 @@
   resolved "https://registry.yarnpkg.com/@types/decamelize/-/decamelize-1.2.0.tgz#aabc2306e6c229356636cab7fcb823cfe170f056"
 
 "@types/mocha@^5.0.0":
-  version "5.2.0"
-  resolved "https://registry.yarnpkg.com/@types/mocha/-/mocha-5.2.0.tgz#b3c8e69f038835db1a7fdc0b3d879fc50506e29e"
+  version "5.2.1"
+  resolved "https://registry.yarnpkg.com/@types/mocha/-/mocha-5.2.1.tgz#465450aaf5cec6f7d35523748c6cc89a5e222dc5"
 
 "@types/node@*", "@types/node@^10.0.0":
   version "10.3.0"
@@ -160,6 +166,16 @@ esprima@^4.0.0:
   version "4.0.0"
   resolved "https://registry.yarnpkg.com/esprima/-/esprima-4.0.0.tgz#4499eddcd1110e0b218bacf2fa7f7f59f55ca804"
 
+esquery@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/esquery/-/esquery-1.0.1.tgz#406c51658b1f5991a5f9b62b1dc25b00e3e5c708"
+  dependencies:
+    estraverse "^4.0.0"
+
+estraverse@^4.0.0:
+  version "4.2.0"
+  resolved "https://registry.yarnpkg.com/estraverse/-/estraverse-4.2.0.tgz#0dee3fed31fcd469618ce7342099fc1afa0bdb13"
+
 esutils@^2.0.2:
   version "2.0.2"
   resolved "https://registry.yarnpkg.com/esutils/-/esutils-2.0.2.tgz#0abf4f1caa5bcb1f7a9d8acc6dea4faaa04bac9b"
@@ -217,8 +233,8 @@ js-tokens@^3.0.2:
   resolved "https://registry.yarnpkg.com/js-tokens/-/js-tokens-3.0.2.tgz#9866df395102130e38f7f996bceb65443209c25b"
 
 js-yaml@^3.7.0:
-  version "3.11.0"
-  resolved "https://registry.yarnpkg.com/js-yaml/-/js-yaml-3.11.0.tgz#597c1a8bd57152f26d622ce4117851a51f5ebaef"
+  version "3.12.0"
+  resolved "https://registry.yarnpkg.com/js-yaml/-/js-yaml-3.12.0.tgz#eaed656ec8344f10f527c6bfa1b6e2244de167d1"
   dependencies:
     argparse "^1.0.7"
     esprima "^4.0.0"