diff --git a/Exareme-Docker/src/exareme/exareme-master/src/main/java/madgik/exareme/master/queryProcessor/HBP/ParameterProperties.java b/Exareme-Docker/src/exareme/exareme-master/src/main/java/madgik/exareme/master/queryProcessor/HBP/ParameterProperties.java
index fd172ab2a8a080098f4778d4203417f142d4c730..4308f62fad14e52b17374dcd71ee85d9595702a7 100644
--- a/Exareme-Docker/src/exareme/exareme-master/src/main/java/madgik/exareme/master/queryProcessor/HBP/ParameterProperties.java
+++ b/Exareme-Docker/src/exareme/exareme-master/src/main/java/madgik/exareme/master/queryProcessor/HBP/ParameterProperties.java
@@ -21,6 +21,7 @@ public class ParameterProperties {
     public enum ParameterType {
         column,                // used for selecting specific columns from the database
         formula,               // used for parsing the input as a formula of R, '+ - * : 0' are allowed.
+        formula_description,    // used for providing a formula description to the algorithm in json format
         filter,                // used for filtering on the database input
         dataset,               // used for choosing database input
         pathology,             // used for specifying what database to use
@@ -33,7 +34,6 @@ public class ParameterProperties {
         real,
         json
     }
-
     public ParameterProperties() {
     }
 
@@ -50,13 +50,15 @@ public class ParameterProperties {
         if (type == null) {
             throw new AlgorithmException(algorithmName, "The parameter field 'type' was not initialized in the properties.json file.");
         } else if (type.equals(ParameterType.column) || type.equals(ParameterType.formula)) {
-            if (columnValuesSQLType == null) {
-            }
-
             if (columnValuesIsCategorical == null) {
                 throw new AlgorithmException(algorithmName, "The parameter field 'columnValuesIsCategorical' was not initialized in the properties.json file.");
             }
-        } else if (valueType.equals(ParameterValueType.json)){
+        }else if (type.equals(ParameterType.formula_description)) {
+            if (!valueType.equals(ParameterValueType.json)) {
+                throw new AlgorithmException(algorithmName, "The parameter field 'valueType' must be json since the 'type' is formula_description.");
+            }
+        }
+        if (valueType.equals(ParameterValueType.json)){
             if(valueMultiple) {
                 throw new AlgorithmException(algorithmName, "The parameter field 'valueMultiple' cannot be true because the 'valueType' is json.");
             }
diff --git a/Exareme-Docker/src/mip-algorithms/DESCRIPTIVE_STATS/properties.json b/Exareme-Docker/src/mip-algorithms/DESCRIPTIVE_STATS/properties.json
index 6cc7a3847584c285e37bbe05500cbd6513ba845e..7517cbab1b6ced8f08958efa9f645495aaf86dd5 100644
--- a/Exareme-Docker/src/mip-algorithms/DESCRIPTIVE_STATS/properties.json
+++ b/Exareme-Docker/src/mip-algorithms/DESCRIPTIVE_STATS/properties.json
@@ -11,7 +11,7 @@
 			"columnValuesSQLType": "real, integer, text",
 			"columnValuesIsCategorical": "",
 			"columnValuesNumOfEnumerations": "",
-			"value": "rightcuncuneus,rightaorganteriororbitalgyrus,leftpogpostcentralgyrus,leftmcggmiddlecingulategyrus,leftsmcsupplementarymotorcortex,leftsogsuperioroccipitalgyrus,leftmtgmiddletemporalgyrus,rightpoparietaloperculum",
+			"value": "lefthippocampus,righthippocampus",
 			"valueNotBlank": true,
 			"valueMultiple": true,
 			"valueType": "string"
@@ -20,7 +20,7 @@
 			"label": "dataset",
 			"desc": "It contains the names of one or more datasets, in which the algorithm will be executed. It cannot be empty",
 			"type": "dataset",
-			"value": "adni,edsd",
+			"value": "adni,edsd, ppmi",
 			"valueNotBlank": true,
 			"valueMultiple": true,
 			"valueType": "string"
@@ -29,12 +29,12 @@
             "name": "formula",
             "label": "formula",
             "desc": "Patsy formula  (R language syntax).",
-            "type": "other",
-            "value": "",
+            "type": "formula_description",
+            "value": "{\"single\":[{\"var_name\":\"lefthippocampus\",\"unary_operation\":\"log\"},{\"var_name\":\"righthippocampus\",\"unary_operation\":\"exp\"}],\"interactions\":[]}",
             "defaultValue": "",
             "valueNotBlank": false,
             "valueMultiple": false,
-            "valueType": "string"
+            "valueType": "json"
         },
         {
 			"name": "filter",
diff --git a/Exareme-Docker/src/mip-algorithms/README.md b/Exareme-Docker/src/mip-algorithms/README.md
index 379b01a342fa9b8a47ff54a47dc36c8a6b2ac377..2412908c2c011157f56ace28dbe1ef89d124db69 100644
--- a/Exareme-Docker/src/mip-algorithms/README.md
+++ b/Exareme-Docker/src/mip-algorithms/README.md
@@ -41,7 +41,8 @@ The parameter has the following properties:<ul>
 <li><code>type</code> Defines the type of the parameter. It can take the following values:
 <ol>
 <li><code>column</code> (Used for querying the columns of the database.)</li>
-<li><code>formula</code> (Same as the column type but is is parsed as a formula of R. Allowed characters are '+ - * : 0.' )</li>
+<li><code>formula</code> (Same as the column type but it is parsed as a formula of R. Allowed characters are '+ - * : 0.' )</li>
+<li><code>formula_description</code> (Similar to the column and formula types but it is parsed as a json object representing a formula. )</li>
 <li><code>filter</code> (Used to filter the results of the database.)</li>
 <li><code>dataset</code> (If the property is of type dataset then it will be used to choose on which dataset to run the algorithm on.)</li>
 <li><code>other</code> (For any other reason use this type.)</li>