diff --git a/toolbox/utilities/functionSignatures.json b/toolbox/utilities/functionSignatures.json
index 0545b392d..48e8a955e 100644
--- a/toolbox/utilities/functionSignatures.json
+++ b/toolbox/utilities/functionSignatures.json
@@ -6,14 +6,9 @@
         "name": "market",
         "kind": "namevalue",
         "type": [
-          [
-            "char",
-            "choices={'Nasdaq','SP500','NYSE','FTSEMIB','London','DAX40','CAC40','Nikkei225'}"
-          ],
-          [
-            "string",
-            "choices={'Nasdaq','SP500','NYSE','FTSEMIB','London','DAX40','CAC40','Nikkei225'}"
-          ]
+          ["char"],
+          ["string"],
+          ["choices={'Nasdaq','SP500','NYSE','FTSEMIB','London','DAX40','CAC40','Nikkei225'}"]
         ],
         "purpose": "Market or index name"
       },
@@ -31,14 +26,9 @@
         "name": "Source",
         "kind": "namevalue",
         "type": [
-          [
-            "char",
-            "choices={'static','dynamic'}"
-          ],
-          [
-            "string",
-            "choices={'static','dynamic'}"
-          ]
+          ["char"],
+          ["string"],
+          ["choices={'static','dynamic'}"]
         ],
         "purpose": "Source used to build the market universe"
       },
@@ -86,15 +76,9 @@
         "name": "ticker",
         "kind": "required",
         "type": [
-          [
-            "char"
-          ],
-          [
-            "string"
-          ],
-          [
-            "cellstr"
-          ]
+          ["char"],
+          ["string"],
+          ["cellstr"]
         ],
         "purpose": "Ticker symbol or collection of ticker symbols"
       },
@@ -102,14 +86,9 @@
         "name": "LastPeriod",
         "kind": "namevalue",
         "type": [
-          [
-            "char",
-            "choices={'1d','5d','1mo','3mo','6mo','1y','2y','5y','10y','ytd','max'}"
-          ],
-          [
-            "string",
-            "choices={'1d','5d','1mo','3mo','6mo','1y','2y','5y','10y','ytd','max'}"
-          ]
+          ["char"],
+          ["string"],
+          ["choices={'1d','5d','1mo','3mo','6mo','1y','2y','5y','10y','ytd','max'}"]
         ],
         "purpose": "Time span to download"
       },
@@ -117,14 +96,9 @@
         "name": "interval",
         "kind": "namevalue",
         "type": [
-          [
-            "char",
-            "choices={'1m','2m','5m','15m','30m','60m','90m','1h','1d','5d','1wk','1mo','3mo'}"
-          ],
-          [
-            "string",
-            "choices={'1m','2m','5m','15m','30m','60m','90m','1h','1d','5d','1wk','1mo','3mo'}"
-          ]
+          ["char"],
+          ["string"],
+          ["choices={'1m','2m','5m','15m','30m','60m','90m','1h','1d','5d','1wk','1mo','3mo'}"]
         ],
         "purpose": "Sampling interval requested to Yahoo Finance"
       },
@@ -171,43 +145,21 @@
         "name": "topPanelMode",
         "kind": "namevalue",
         "type": [
-          [
-            "char",
-            "choices={'candle','line','ma','boll'}"
-          ],
-          [
-            "string",
-            "choices={'candle','line','ma','boll'}"
-          ],
-          [
-            "struct",
-            "scalar",
-            "field Name required",
-            "Name choices={'candle','line','ma','boll'}",
-            "admissible fields depend on Name: candle->{Name,widthFactor,upColor,downColor}; line->{Name}; ma->{Name,maFastLen,maMidLen,maSlowLen,showMACrossovers}; boll->{Name,bollWindow,bollNumStd}"
-          ]
-        ],
-        "purpose": "Type of plot in the top panel; \n when supplied as a struct, \n it also controls the suboptions associated with the selected visualization"
+          ["char"],
+          ["string"],
+          ["choices={'candle','line','ma','boll'}"],
+          ["struct", "scalar"]
+        ],
+        "purpose": "Type of plot in the top panel; when supplied as a struct, it also controls the suboptions associated with the selected visualization"
       },
       {
         "name": "bottomPanelMode",
         "kind": "namevalue",
         "type": [
-          [
-            "char",
-            "choices={'rsi','stoch','macd','williamsr','roc'}"
-          ],
-          [
-            "string",
-            "choices={'rsi','stoch','macd','williamsr','roc'}"
-          ],
-          [
-            "struct",
-            "scalar",
-            "field Name required",
-            "Name choices={'rsi','stoch','macd','williamsr','roc'}",
-            "admissible fields depend on Name: rsi->{Name,topRSI,lowRSI,rsiLen}; stoch->{Name,topStoch,lowStoch,stochLen,stochSmooth}; macd->{Name,macdFastLen,macdSlowLen,macdSigLen}; williamsr->{Name,topWilliams,lowWilliams,wrLen}; roc->{Name,rocLen}"
-          ]
+          ["char"],
+          ["string"],
+          ["choices={'rsi','stoch','macd','williamsr','roc'}"],
+          ["struct", "scalar"]
         ],
         "purpose": "Indicator shown in the bottom panel; when supplied as a struct, it also controls the suboptions associated with the selected indicator"
       },
@@ -264,15 +216,9 @@
         "name": "ticker",
         "kind": "required",
         "type": [
-          [
-            "char"
-          ],
-          [
-            "string"
-          ],
-          [
-            "cellstr"
-          ]
+          ["char"],
+          ["string"],
+          ["cellstr"]
         ],
         "purpose": "Ticker symbol or collection of ticker symbols"
       },
@@ -280,14 +226,9 @@
         "name": "RankBy",
         "kind": "namevalue",
         "type": [
-          [
-            "char" ,
-            "choices={'marketCap','trailingPE','forwardPE','priceToBook','beta','enterpriseValue','profitMargins','returnOnEquity','returnOnAssets','totalRevenue'}"
-          ],
-          [
-            "string" ,
-            "choices={'marketCap','trailingPE','forwardPE','priceToBook','beta','enterpriseValue','profitMargins','returnOnEquity','returnOnAssets','totalRevenue'}"
-          ]
+          ["char"],
+          ["string"],
+          ["choices={'marketCap','trailingPE','forwardPE','priceToBook','beta','enterpriseValue','profitMargins','returnOnEquity','returnOnAssets','totalRevenue'}"]
         ],
         "purpose": "Numeric variable used to rank rows in descending order"
       },
@@ -295,18 +236,10 @@
         "name": "ExplainFields",
         "kind": "namevalue",
         "type": [
-          [
-            "logical",
-            "scalar"
-          ],
-          [
-            "char",
-            "choices={'all','basic','valuation','performance'}"
-          ],
-          [
-            "string",
-            "choices={'all','basic','valuation','performance'}"
-          ]
+          ["logical", "scalar"],
+          ["char"],
+          ["string"],
+          ["choices={'all','basic','valuation','performance'}"]
         ],
         "purpose": "Display explanation of available fields or presets"
       },
@@ -314,17 +247,10 @@
         "name": "Fields",
         "kind": "namevalue",
         "type": [
-          [
-            "char",
-            "choices={'all','basic','valuation','performance'}"
-          ],
-          [
-            "string",
-            "choices={'all','basic','valuation','performance'}"
-          ],
-          [
-            "cellstr"
-          ]
+          ["char"],
+          ["string"],
+          ["choices={'all','basic','valuation','performance'}"],
+          ["cellstr"]
         ],
         "purpose": "Field preset or custom list of output variables"
       }
@@ -338,5 +264,73 @@
         "purpose": "Table of fundamental company information"
       }
     ]
+  },
+  "zscoreFS": {
+    "inputs": [
+      {
+        "name": "X",
+        "kind": "required",
+        "type": [
+          ["double"],
+          ["table"]
+        ],
+        "purpose": "Input data. Vector, Matrix, 3D array or table"
+      },
+      {
+        "name": "loc",
+        "kind": "ordered",
+        "type": [
+          ["char"],
+          ["string"],
+          ["choices={'median','mean'}"]
+        ],
+        "purpose": "Location measure to use ('median' or 'mean')"
+      },
+      {
+        "name": "scale",
+        "kind": "ordered",
+        "type": [
+          ["char"],
+          ["string"],
+          ["choices={'mad','Qn','Sn','std'}"]
+        ],
+        "purpose": "Scale measure to use"
+      },
+      {
+        "name": "dim",
+        "kind": "ordered",
+        "type": [
+          "double",
+          "scalar",
+          "integer",
+          ">=1"
+        ],
+        "purpose": "Dimension to operate along"
+      }
+    ],
+    "outputs": [
+      {
+        "name": "Z",
+        "type": [
+          ["double"],
+          ["table"]
+        ],
+        "purpose": "Centered and scaled version of X"
+      },
+      {
+        "name": "mu",
+        "type": [
+          "double"
+        ],
+        "purpose": "Location estimate"
+      },
+      {
+        "name": "sigma",
+        "type": [
+          "double"
+        ],
+        "purpose": "Scale estimate"
+      }
+    ]
   }
 }